Akielaszek JJ,Haines TA.1981.Mercury in the muscle tissue of from three northern Maine lakes. Bull Environ Contam Toxicol 27: 201-208.

Appelberg,M. And Alden, U. 1992. Integrerad uppfoljing av kalkningens effekter (IKEU). En trearsrapport. (English summary: Three years of integrated monitoring of limed lakes and rivers in Sweden. Information from the Inst. Of Freshw. Res., Drottningholm, 4, 1-6

Alonen K., Arvola L., Tulonen T., Hammar T., Metsala T.-R., Kankaala P. & Munster, U. 1992. Planktonic food chains of a highly humic lake. 1. A mesocosm experiment during the spring primary production maximum. Hydrobiologia 229: 125 – 142.

Bernes C. 1996. The Nordic Arctic Enviroment unspoilt, exploited, Polluted? Nord 1966:22. 239 p

Bergqvist B.1987 Soil solution chemistry and metal budgets of spruce forest ecosystems in S.Sweden. Water Air Soil Pollut. 33, 131-154.

Borg H.1987. Trace metals and water chemistry of forest lakes in northern Sweden. Water Res. 21, 65-72.

Bloom, N.S., C.J. Watras, and J.P.Hurley. 1991. Impact of acidification on the methylmercury cycle of remote seepage lakes. Water Air Soil Pollut. 56: 477-492.

Benes P, Gjessing ET, Steinnes E (1976) Interactions between humus and trace elements in fresh water. Water Res 10: 711-716.

Birchall JD, Exley C, Chappell JS, Phillips MJ (1989) Acute toxicity of aluminium to fish eliminated in silicon-rich acid water. Nature (Lond) 338: 146-148.

Booth LE, McDonald DG, Simons BP, Wood CM (1988)Effecs of aluminium and low pH on net ion fluxes and ion balance in the brook trout (Salvelinus fontinalis). Can J Fish Sci 45: 1563-1574.

Borg H (1983) Trace metals in Swedish natural fresh waters. Hydrobiology 101: 27-34.

Borg H (1987) Trace metals and water chemistry of forest lakes in northern Sweden. Water Res 21: 65-72.

Bengtsson, B. and Bogelius, A. 1995. “Socio-economic consequences of aquatic”, In: Henrikson, L. and Brodin, Y.W.(Eds), Liming of acidified surface water a Swedish synthesis, Springer-Verlag, Berlin, Heidelberg, 423-458.

Baker J.D, Schofield C.P.1982. Aluminium toxicity to fish in acidic waters. Water Air Soil Pollut 18: 289-309.

Berdowski J.J.M., Baas J., Bloos JP J., Visschedijk A.J.H.& Zandveld P.Y.J. 1997. The European emission inventory of heavy metals and persistent organic pollutants. TNO, Report UBA-FB, UFOPLAN – Ref. No. 104 02 672/03, Apeldoorn, 239 pp

Bjorklund, I., Borg, H., and Johansson, K., Mercury in Swedish lakes – its regional distribution and causes, Ambio, 13, 118, 1984.

Barrie L.A., D.Gregor, Hargrave, R. Lake, D. Muir, R. Shearer, B. Traccey, T.Bidleman, 1992. Arctic contaminants; sources, occurences and pathways. Sci. Tot. Env. 122. 1-74

Сowling, Ellis B, 1980: A historical resume of progress in scientific and public understanding of acid precipitation and its biological consequences.-In: Research report (Fagrapport, FR) 18/80, SNSF-project, Oslo-As, Norway.

Chang ,P.S.S. & Malley, D.F. 1989. Partiai recovery of the zooplankton community in a smail Precambrian Shield lake as experimental acidification is reduced. Symp. Biol. Hung. 38. 203-8.

Cook.R.B., Kelly, C.A., SchindlerD.W. & Turner.M.A. 1986. Mechanisms of hydrogen ion neutralization in an experimentally acidified lake. Limnology and Oceanography 31, 134-48

Davies,I.J.1989. Population collapse of the crayfish Orconectes virilis in response to experimental whole-lake acidification. Canadian Journal of Fisheries and Aquatic Sciences 45. 910-22.

Dillon, P.J., Reid,R.A. &Girard,R.1986. Changes in the chemistry of lakes near Sudbury. Ontario following reduction of SO₂ emission. Water, Air and Soil Pollution 31. 59-65

Dickson W. 1985. Acid rain in Sweden: effects on lake ecosystems In: International longress “Lake pollution and recovery. Vismaea R., Morforio R., Mwzzanottev. Cernusbhis (eds) Rome, 15 U-18^th April 1985. Proceeding. ANDIS. Pp. 442-447.

Dickson, W, 1975: The acidification of Swedish lakes. Rep. Inst. Freshw. Res. Drottningholm, 54: 8-20.

Dillon PJ, Evans HE, Scholer PJ (1988) The effects of acidification on metal budgets of lakes and catchments. Biogeochemistry 5: 201-220.

Driscoll CT, Baker JP, Bisogni JJ, Schofield CL (1980) Effect of Al speciation on fish in dilute acidified waters. Nature (Lond) 284: 121-130.

Driscoll, C.T., Linkens,G.E. & Church, M.R. 1998 Recovery of surface waters in the northeastern U.S. from decreases in atmospheric deposition of sulfur. Wat. Air Soil Pollut. 105, 319-329 .

Dillon P., Evans H.E. and Scholer P.J. 1988 The effects of acidification on metal budgets of lakes and catchments. Biogeochemistry 5, 201-220

RODYUSHKIN I., MOISEENKO T., KUDRYAVTSEVA L. 1995. Aluminium in the Surface Waters of the Kola Peninsula // The Sci. Tot. Envir. 163, P.55-59. (in Russian).

RODYUSHKIN I.V., MOISEENKO T.I., KUDRYAVTSEVA L.P. 1996. Changes in Trace Element Speciation in Kola North Surface Waters During Snow Melt // Water, Air, and Soil Pollution. V.2, P.731-736.

Dickon W. 1978. Some effects of the acidification of Swedish lakes/ Verh. Internat. Verein. Limnol. 20. 851-856. Stuttgart,

De Vries W.,Posch M.,J.Kamari.1989.Simulation of the long-term soil responce to acid deposition in various buffer ranges.Water,Air and Soil Pollution,48:349-390

Eaton, G.G., W.A. Swenson, J.H. McCormick, T.D. Simonson, and K.M. Jensen. 1992. A field and laboratory investigation of acid effect on largemouth bass, rock bass, black crappie, and yellow perch. Trans. Am. Fish. Soc. 121: 644-658.

ECE, 1981: Report of the Third Seminar on Desulphurization of Fuels and Combustion Gases. Economic Commission for Europe , Geneve.

Erichsen jones, L.R., 1964; Fish and River Pollution. – 203 p.

Everhart, W.H. & Freeman, R.A., 1973: Toxic effects of aqueous alumi num to rainbow trout. – EPA-R3-73-011 b. 41p.

Eloranta P. 1978. Light penetration in different types of lakes in Central Finland. Holarct. Ecol. 1: 362-366.

Eloranta, P. 1988. Kellicottia bostoniensis (Rousselet), a planktonic rotifer species new to Finland. Ann. Zool. Fennici 25: 249 – 252.

Findlay,D.L. 1990. Phytoplankton communities of lakes experimentally acidified with sulfuric and nitric acids. . Canadian Journal of Fisheries and Aquatic Sciences 47, 1378-86.

Findlay,D.L. 1991. Response of a phytoplankton community to controlled partial recovery from experimental acidification.. Canadian Journal of Fisheries and Aquatic Sciences (in press).

France,R.L.1987. Reproductive impairment of the crayfish Orconectes virilis in response to acidification of Lake 223. .. Canadian Journal of Fisheries and Aquatic Sciences 119 (Suppl.l), 107-13.

France,R.L & Graham. L. 1985. Increased microsporidian parasitism of the crayfish Orconectes viriilis in an experimentally acidified lake. Water, Air and Soil Pollution 26, 129-36.

Findlay,D.L. & Kasian,S.E. 1986. Phytoplankton responses to acidification of Lake 223, Experimental Lake Area, northwestern Ontario. Water, Air and Soil Pollution 30, 719-26.

Frost T.M., P.K. Montz, T.K. Kratz, T.Badillo, P.L.Brezohik M.J. Gonzaler, R.G.Rada, C.I.Watras, K.E.Webster, J.G. Wiener, C.E.Williamson, D.P.Morris .1999. Multiple stresses from a single agent: Diverse responses to the experimental acidification of Little Rock Lake, Wisconsin Limnal. Oceanogr. 44(3) part. 2. 784-794

Frost, T.M. & Montz, P.K. 1988. Tarly zooplankton response to experimental acidification in Little Rock Lake. Wisconsin, USA. Verhandlungen Internationale Vereinigung Jur Limnologie 23, 2279-85.

Fitzgerald, W.F., R.P.Mason, and G.M.Vandal. 1991. Atmospheric cycling and air-water exchange of mercury over mid-continental lacustrine regions. Water Air Soil Pollut. 56: 745-767.

Forsius M., Alveteg M, A.Jenkins, M. Johansson, S. Kleemola, A. Lukewille, M. Posch, H. Sverdrup, C. Walse. 1998. MAGIC, SAFE, and SMAPT model appli-Cations at integrated monitoring sites; effects of emission reduction scenarios. Water, Air and Soil Pollution 105: 21 –30

Forsius M.,M.Johansson,M.Posch,M.Holmberg,J.Kamari,A.Lepisto,J.Roos, S.Syri, M.Starr.1997.Modelling the eefects of climate change,acidic deposition and forest harvesting on the biogeochemistry of a boreal forested catchment in Finland.Boreal Enviroment Rasearch,2:129-143

Gonzalez, M.J., and T.M. Frost. 1994. Comparisons of laboratory bioassays and a whole-lake experiment: Rotifer responses to experimental acidification. Ecol. Appl. 4: 69-80.

Geelen, J.F.M. & Leuven,R.S.E.W. 1986. Impact of acidification on phytoplankton and zooplankton communities. Experimentia 42, 486-94.

Gonzales, M.J., Frost,T.M.& Montz,P.K.1990. Effects of experimental acidification on rotifer population dynamics in Little Rock Lake. U.S.A. Verhandlungen Internationale Vereinigung fur Limnologie 24, 449-56.

Graham,R.W. & Turner,M.A.1987. Photoinhibition of respiration in epillthic periphyton. CanadianJournal of Fisheries and Aquatic Sciences 0-3.

Gunn,J.M. & Keiler,W.1990. Biological recovery in an acid lake after reductions in industrial emissions of sulfur. Nature 345. 431-3.

Hurley, J.P., and C.J.Watras. 1991. Identification of bacteriochlorophylls in lakes via reverse-phase HPLC. Limnol. Oceanogr. 36: 307-315.

Henrikson, L. and Brodin, Y.-W.: 1995, “Liming of surface water in Sweden – a synthesis”, In: Henrikson, L. and Brodin, Y.W. (Eds), Liming of acidified surface water a Swedish synthesis, Springer-Verlag, Berlin, heidelberg, 1-44.

Hakanson L, Nilsson A, Andersson T (1988) Mercury in fish in Swedish lakes. Environ Pollut 49: 145-162

Henriksen A, Wright RF (1978) Concentrations of heavy metals in small Norwegian lakes. Water Res 12: 101-112

Hultberg H (1988) Critical load for sulphur to lake and streams. In: Critical loads for sulphur and nitrogen. Rep workshop. Skokloser Sweden 19-24 March 1988. Nord Miljorapp 15: 185-200

HENRIKSEN A., KAMARI J., POSCH M., FORSIUS M., WILANDER A., MOISEENKO T.I. 1994. Critical Loads for surface waters in Scandinavia and Kola region. Critical loads and critical limit values // Proceeding of the Finnish-Swedish Environmental conference Vaasa, Finland. P.97-109.

HENRIKSEN A, J. MANNIO, A.S. BERNTELL, MOISEENKO T.I. at al. 1996. Regional Lake Surveys in Finland-Norway-Sweden-Northern Kola-Russian Karelia-Scotland-Wales. Oslo. 30 p.

Henriksen, A., Skjelkvale,B., Mannio,J., Wilander,A., Harriman,R., Curtis,C., Jensen,J.P., Fjeld,E., & Moiseenko,T., 1998: Northern European Lake Survey,1995. Finland, Norway, Sweden, Denmark, Russian Kola, Russian Karelia, Scotland and Wales. – Ambio 27(2):80-91.

Hornstrom,E., 1977: Effects of acidification on phytoplankton. – Nat. Swedish Env.Prot. Board, in press.

Iivonen P., T.Jarvenpaa, A.Lappalainen, J.Mannio and M.Rask. Chemical, biological and socio-economic approaches to the liming of lake Alinenjarvi in southern Finland. Water , Air and Soil Pollution 85: 937-942, 1995.

Johnson N.M. 1979 . Acid rain: Neutralization within the Hubbard Brook Ecosystem and regional Implications. Science 204, pp. 497 – 499

Johnson M.G. 1987 Trace element loadings to sediments of fourteen Ontario lakes and correlations with concentrations in Fish. Can J Fish Aquat Sci 44: 3-13

Kelly, C.A. & Rudd,J.W.M. & Schindler,D.W.1990. Lake acidification by nitric acid: future considerations. Water, Air and Soil Pollusion 50, 49-61.

Keller,W., and N.D.Yan. 1991. Recovery of crustacean zooplankton species richness in Sudbury area lakes following water quality improvements. Canadian Journal of Fisheries and Aquatic Sciences 48: 1635-1644.

Keller,W., and N.D.Yan. 1998. Biological recovery from lake acidification: zooplankton communities as a model of patterns and processes. Restoration Ecology 6: 364-375.

Kippo-Edlund P., Heitbo A. 1990. Phytoplankton and Acidofication on small forest Lakes in Finland. In: Kauppi P., Anttila P., Kenttamies K. (ed). Acidification in Finland. Springer Verlag. Berlin. Heidelberg. P. 997-983.

.Kahkonen, A.-M. And Mahonen, O.: 1993, Applied Geochemistry, Suppl. Issue 2, 49-50.

Kortelainen,P., 1993: Content of total organic carbon in Finnish lakes and its relationship to catchment characteristics.-Can. J> Fish. Aquat. Sci. 50:1477-1483.

Keskitalo J., K.Salonen and A-L Holopainen. Long-terv fluctuations in environmental conditions, plankton and macrophytes in a humic lake, Valkea-Kotinen. Boreal environment research 3: 251-262. Helsinki 13 November 1998.

Keskitalo J., Salonen K. & Holopainen A.-L. 1998. Longterm fluctuations in environmental conditions, plankton and macrophytes in a humic lake, Valkea-Kotinen. Boreal Env. Res. 3; 251-262

Keskitalo J. & Salonen K. 1998. Fluctuations of phytoplankton production and chlorophyll concentration in a small humic lake during six years (1990-1995). In:George D.G., Jones J.G., Puncochar P., Reynolds C.S. &Sutcliffe D.W. (eds.), Management of lakes and reservoir during global climate change. Kluver Academic Publishers, pp. 93 – 109.

Kidd.K.A., Shindler D.C., G.Muir, W.L. Lockhart, R.H.Hesslein. 1995. High Concentrations of toxaphene in fishes from a subarctic lake. Science, 269; 240-242

Lozovic P.A. and Basova S.V. Entrance of chemical substances with precipitation in Karelia. Acidification of inland waters. Paula Mononen and Peter Lozovik (eds.) The third Soviet-Karelian-Finnish symposium on water problems, Joensuu, Finland, 3-7 June 1991. Helsinki 1994.

Likens, G.E. 1992. The ecosystem approach: Its use and abuse. Ecol. Inst.

Locke,A., and W.G. Sprules. 1994. Effect of lake acidification and recovery on the stability of zooplankton food webs. Ecology 75:498-506.

Laurila, T., 1990, “Wet deposition trends of major inorganic ions in Finland based on daily bulk deposition samples”, Water, Air and Soil Pollution, 52, 295-324.

Leinonen, L. 1994 (ed), “Air quality measurements 1993”, Finnish Meteorological Institute, 245 pp.

Lehtonen J (1989) Effects of acidification on the metal levels in aquatic macrophytes in Espoo, S. Finland. Ann Bot Fenn 26: 39-50.

Lindqvist O, Jernelov A, Johansson K, Rodhe H (1984) Mercury in the Swedish environment-global and local sources. SNV, PM 1816, 105pp

Laurila, T., 1990, “Wet deposition trends of major inorganic ions in Finland based on daily bulk deposition samples”, Water, Air and Soil Pollution, 52, 295-324.

Leinonen, L. 1994 (ed), “Air quality measurements 1993”, Finnish Meteorological Institute, 245 pp.

Lappalainen A, O. Mahonen, J. Erkinaro, M. Rask and E. Niemela. Acid deposition from the russian Kola Peninsula: are sensitive fish populations in North-Eastern finnish Lapland affected? Water, Air and Soil Pollution 85: 439-444, 1995.

Lind,C.J. & Hen, J.D. 1975: Effects of organic solutes on chemical reactions of aluminum. U.S.Geol.Surv., Water-Supply Paper 1827 b: 88p.Wiklander,G., 1977: Royal Swedish Forestry High School Stockholm, pers. Comm.

Lahermo P., Ilmasti M., Juntunen R.& Taka M. 1990. The hydrogeochemical mapping of Finnish groundwater. Geochemical Atlas of Finland, part 1. Geologian tutkimuskeskus. Geological Survey of Finland, Espoo, 66 pp.

Lahermo P., Vaananen P., Tarvainen T. & Salminen R. 1996. Suomen Geokemian Atlas, osa 3: Ymparistogeokemia – purovedet ja sedimentit. The Geochemical Atlas of Finland, part 3: Environmental geochemistry 0 stream waters and sediments. Geologian tutkimuskeskus. Geological Survey of Finland, Espoo, 147 pp.

Lazerte B., Evans D.& Grauds P. 1989. Deposition and transport of trace metals in an acidified catchment of central Ontario. Sci. Tot/. Environ. 87/88: 209-221.

Lodenius, M., Aquatic plants and littoral sediments as indicators of mercury pollution in some areas in Finland, Ann. Bot. Fennici, 17, 336, 1980

Mcknight, D., D., F. Brakke, and P.J.Mulholland [EDS]. 1996. Freshwater ecosystems and climate change in North America. Limnol. Oceanogr. 41(5).

Malley,D.F.1980. Decreased survival and calcium uptake by the crayfish Orconectes virilis in low pH.Canadian Journal of Fisherries and Aquatic Sciences 37. 364-72.

Malley,D.F., Findlay,D.L. & Chang,P.S.S. 1982. Ecological effects of acid precipitation on zooplankton. In Acid Precipitation: Effects on Ecological Systems. Pp. 297-327, ed., D^, Itri, F.M.Ann Arbor, Michigan: Ann Arbor Science.

Mills,K.H., Chaianchuk,S.M., Mohr,L.C. & Davies,I.J.1987. Responses of fish populations to 8 years of experimental acidification. Canaaian Journal of Fisheries and Aquatic Sciences 44 (Suppi.1), 114-25.

Malley,D.F., and P.S.S. Chang. 1994. Assessing the health of a zooplankton community in a small Precambrian Shield lake during recovery from experimental acidification. Journal of Aquatic Ecosystem Health 3:272-286.

Merilainen I., I., Hynynen I., 1990. Benthic inverterbrates in relation to acidity in Finnish Forest Lakes.In: Kauppi P (ed). Acidification in Finland. Springer Verlag. Berlin. Heidelberg р. 1029-1049

Mantoura RFC, Dickson A, Riley JP (1978) The complexation of metals with humic materials in natural waters. Estuar Coast Mar Sci 5: 387-408

Moreau G, Barbeau C, Frenetk JJ, Saint-Onge J, Simoneau M (1983) Zinc, manganese, and strontium in opercula and scales of brook trout (Salvelinus fontinalis) as indicators of lake acidification. Can J Fish Aquat Sci 40: 1685-1691

Mannio J., M. Verta and O. Jarvinen. Trace metal concentration in the water of small lakes, Finland. Applied Geochemistry, Suppl. Issue Nj. 2, pp. 57-59, 1993.

MOISEENKO T., RODYUSHKIN I., DAUVALTER V., KUDRYAVTSEVA L. 1996. Quality formation of surface waters and bottom sediments under conditions of anthropogenic loads on water catchments within the Arctic area. Apatity, Kola Science Centre, Russian Academy of Sciences: 263 p. (in Russian, Conclusion in English).

MOISEENKO T.I. 1996. Critical Load of SO₄ for surface waters in the Kola region of Russia // Water, Air, and Soil Pollution. V.2, P.469-473.

MOISEENKO T.I. DAUVALTER V.A., KAGAN L. 1996. Mountain lakes of Russian Subarctic as markers of air pollution: acidification, metals and paleolimnology // Proceedings of the 5th International Conference on Atmospheric Sciences and Applications to Air Quality, 18-20 June, 1996, University of Washington, Seattle, Washington, USA, 48 p.

MOISEENKO T.I. 1995. Ecotoxicology of the lakes in industrial regions of Russia Subarctic. Critical loads // Conservation and management of lakes. 23-27 Oct., Japan. P.121-126.

MOISEENKO T., KUDRYAVTSEVA L., RODYUSHKIN I., DAUVALTER V., LUKIN A., KASHULIN N. 1995. Airborne Contaminants by Heavy Metals and Aluminium in the Freshwater Ecosystems of the Kola Subarctic region // The Sci. Tot. Envir., 160/161, P.715-727. (in Russian).

MOISEENKO T.I. 1994. Acidification and critical loads in Surface Waters; Kola, Northern Russia. Ambio, Vol. 23. N7. P.418-224.

MOISEENKO T.I. 1994. Acidification and pollution by heavy metals of Kola surface water // Air Pollution Problems in the Northern Region of Fennoskandia included Kola. NILU, P.139-150.

MOISEENKO T. 1993. Multipollution of Large Lakes in Kola Subarctic and Water Quality Criteria // Strategies for Lake Ecosystems Beyond 2000, Italy. P.337-340.

MOISEENKO T.I. 1993. Vulnerability to acidification of Subarctic lakes on the Kola Peninsula // Strategies for Lakes Ecosystems beyond 2000, Italy. P.427-431.

MOISEENKO T. 1993. Heavy Metals in Surface Water of Kola Peninsula and Toxic Effects // Speciation of Elements in Environmental and Biological Sciences, Norway. 27 p.

MOISEENKO T.I., LUKIN A.A., KASHULIN N.A., KUDRYAVTSEVA L.P. 1993. Airborne Contaminants by Heavy Metals in the Freshwater Ecosystems of the Kola Subarctic Region // Ecological Effects of Arctic Airborne Contaminants. International Symposium. 103 p. (in Russian).

MOISEENKO T.I. 1992. Acidification of water system in northern Kola Environment // Symposium on the State of the Environment and Environmental Monitoring in Northern Fennoskandia and the Kola Peninsula Rovaniemi Finland. P.148­151.

MOISEENKO T.I. 1992. Waters acidification on the Kola North // Conference on Environs Metrics in Finland Helsinki, Finland. P.132­133.

MOISEENKO T., KUDRYAVTSEVA L. 1990. The Regularities of the Heavy Metals Accumulation in Organism Systems of Fresh Water Fishes and Pathological Processes // Excess and Deficiency of Trace Elements in Relation to Human and Animal Health in Arctic and Subarctic Region. Nordic Council Academy of Science and Letters, P.27-81.

MOISEENKO T., YAKOVLEV V. 1990. Anthropogenic transformations of water ecosystems in Kola Peninsula. Leningrad, Nauka, 221 p. (in Russian).

Mannio J, A.Raike and J. Vuorenmaa. Finnish lake survey 1995: regional characteristics of lake chemistry. Verh. Internat. Verein. Limnol. 27. 1-6. Stuttgart, September 1999.

Metsala, T. and Rask, M., Mercury concentrations of perch, Perca fluviatilis L., in small Finnish headwater lakes with different pH and water colour, Aqua Fennica, 19, 41, 1989.

Meili, M., Mercury in Boreal Forest Lake Ecosystems, Doctoral dissertation, Uppsala University, Lindbergs Grafiska HB, Uppsala, Sweden, 1991, 7.

Meili, M., The coupling of mercury and organic matter in the biogeochemical cycle – towards a mechanistic model for the boreal forest zone, Water Air Soil Pollut., 56, 333, 1991.

Nero R.W. & Schindler,D.W. 1983. Decline in Mysis relicta during acidification of Lake 223. Canadian Journal of Fisheries and Aquatic Sciences 40, 1905.

Nriagu J.O, Pacyna J.M (1988) Quantitative assessment of worldwide contamination of air, water and soil by trace metals. Nature (Lond) 333: 134-139

Norrgren L., Wicklund Glynn, A. and Malmborg,O.1991,Journal of Fish Biology 39, 833-847.

OECD, 1977: The OECD programme on long range Transport of air pollutants; Measurement and findings. Organisation for Economic Co-operation and Development, Paris.

OECD, 1981: The Costs and Benefits of Sulphur Oxide Control. A Methodological Study. Organisation for Economic Co-operation and Development, Paris.

Penninqston W,1988.Long-ferm. Natural acidification of up land sites in Cumbris: evidence from post-glacilake sediment s. Freshwater Biological Association. Annual Report, 52 28-46

Posch M.,G.J.Reinds, De Vries W.1993.SMART-a simulation model for acidification’s regional trends:model description and users manual.Mimeograhp Series of the National Board of Waters and Enviroment 477.Helsinki,Finland

Renberg, 1, and Hedberg, T, 1982:The pH history of lakes in SW Sweden as calculated from the subfossil diatom flora od the sediments.Ambio,1:30-33

Rudd,J.W.M., Kelly,C.A., St.Louis,V., Hesslein,R.H., Furutani, A. & Holoka,M. 1986. Microbial consumption of nitric and sulfuric acids in acidified north temperate lakes. Limnology and Oceanography 31. 1267-80.

Rudd,J.W.M., Kelly,C.A., Schindler,D.W. & Turner,M.A. 1990. A comparison of the acidification efficiencies of nitric and sulfuric acids by two whole-lake addition experiments. Limnology and Oceanograhy 35, 663-79.

Roila, T. 1992, “Monitoring of small lakes acidification during the period 1979-1989” (in Finnish, English abstract). Publication of the Water and Environment Administration, series A 86, 3-65. National Board of Waters and the Environment, Helsinki.

Rask, M.: 1991, “Iso Valkjarvi research: an introduction to a multidisciplinary lake liming study”, Finnish Fish. Res., 12, 25-34.

Rask, M., Raitaniemi, J., Mannio, J., Vuorenmaa, J., Nyberg, K. 1996, “Losses and recoveries of populations in acidified lakes of southern Finland during the last decade”, this volume.

Rask, M., Raitaniemi, J., Mannio, J., Vuorenmaa, J. And Nyberg, K. 1996, “Losses and recoveries of populations in acidified lakes of southern Finland during the last decade”, this volume.

Roila, T. 1992, “Monitoring of small lakes acidification during the period 1979-1989” (in Finnish, English abstract). Publication of the Water and Environment Administration, series A 86, 3-65. National Board of Waters and the Environment, Helsinki.

Rasmussen,J.B., Godbout,L. & Schallenberg,M., 1989: The humic content of lake water and its relationship to watershed and lake morphometry.-Limnol.Oceanogr.34:1336-1343.

Rekolainen,S., 1989: Phosphorus and nitrogen load from forest and agriculttural areas in Finland.-Aqua Fenn. 19: 95-107.

RaskM,A-L.Holopainen,A.Karusalmi,R.Niinioja,J.Tammi,L. Arvola,J.Keskitalo,I..Blomqvist, S.Heinimaa,C.Karppinen, K.Salonen and J.Sarvala. Boreal environment research 3: 263 - 274. Helsinki 13 November 1998.

Rosenguist I.T. 1978. Alternative Sources for acidification of river water in Norway. Science of Total Enviroment. 10. 39-49

Roots E.F., 1989. Climata change: high latitude regions. Climate change 15. H. 223-253

SchindlerD.W. 1988. Experimental studies of chemical, stressors on whole-lake ecosystems. Verh. Ind. Verein. Fur Limn. 23. 1-4].

Brezonik, P.L. and Others. 1993. Experimental acidification of Little Rock Lake, Wisconsin: Chemical and biological changes over the pH range 6.1 to 4.7. Can. J. Fish. Aquat. Sci. 50: 1101-1121.

Schindler, D.W. 1987. Detecting ecosystem responses to anthropogenic stress. Can.J.Fish. Aquat. Sci. 44: (suppl. 1): 6-25.

Schindler, D.W. P.J. Curtis, B.R. Parker, and M.P. Stainton. 1996. Consequences of climate warming and lake acidification for UV-B penetration in North American boreal lakes. Nature 379: 705-708.

Schindler D. W., T.M.Frost, K.H. Mills, P.S.S. Chang, I.J.Dayies, L.Findlay, D.F.Malley, J.A.Shearer and M.A.Turner, P.J.Garrison, C.J.Warras , K.Webster, J.M.Gunn, P.L.Brezonik, W.A.Swenson.199 Comparisons between experimentally – and atmospherically-acidified lakes during stress and recovery. 1991. Proceedings of the Royal Society of Edinburgh. 97B: 193-226

Schindler,D.W. Ruszczynski,T. & Fee,E.L.1980. Hypolimnion injection of nutrient effluents as a method for reducing eutrophication. Canadian Journal of Fisheries and Aquatic Sciences 37, 320-7.

Schindler,D.W., Mills,K.H., Malley,D.F., Findlay,D.L., Shearer,J.A., Davies, I.J., Turner,M.A., Linsey,G.A. & Cruikshank,D.R. 1985a. Long term ecosystem stress: the effect of years of acidification on a small lake. Science 228, 1395-1401.

Schindler,D.W. 1990. Experimental whole lake perturbations as tests of ecosystem theory. Oikos 57, 25-41.

Stoddard J.L,et al 1999.Regional trends in aquatic recovery from acidification in North America and Europe.. Nature, v. 401, 7.

Sampson, C.J., P.L.Brezonik, T.M. Frost, K.E.Webster, and T.D. Simonson. 1995. Experimental acidification of Little Rock Lake, Wisconsin: The first four years of chemical and biological recovery. Water Air Soil Pollut. 85: 1713-1719.

Schindler,D.W. 1987. Recovery of Canadians lakes from acidification. In Reversibiliry of Acidification, pp.2-13, ed., Barth, H.New York: Eisevier Applied Science.

Shearer,J.A. & De Bruyn,E.R. 1986. Phytoplankton productivity responses to direct addition of sulfuric and nitric acids to the waters of a double-basin lake. Water, Air and Soil Poilution 30.695-702.

Shearer,J.A., Free,E.J., DeBruyn,E.R. & DeCleeq,D.R.1987. Phytoplankton primary production and light attentuation responses to the acidification of a smail canadian Shieid lake. Canadian Journal of Fisheries and Aquatic Sciences 44 (Suppl.l), 83-90.

Sierzen,M.E. & Frost,T.M.1990. Effects of lake acidification on zooplankton feeding rates and selectivity. Canadian Journal of Fisheries and Aquatic Sciences47, 772-9.

Smol, J.P. & Dixit, S.S. 1990. Patterns of pH change inferred from chrysophyte microfossils in Adirondack and New England lakes. Journal of Paieolimnology 4. 31-41.

Stokes, P.M. 1986. Ecological effects of acidification on primary producers in aquatic systems. Water, Air and Sail Pollution 30, 421-38.

Schut PH, Evans RD, Scheider WA (1986) Variation in trace metal exports from small Canadian Shield watersheds. Water Air Soil Pollut 28: 225-237

Sprenger MD, McIntosh AW, Hormig S (1988) Concentration of trace elements in yellow perch (Perca fluviatilis) from six acidic lakes. Water Air Soil Pollut 37: 375-388

Stoddard J.L. regional trends in aquatic recovery from acidification in North America and Europe. 1999. Nature, v. 401, 7.

Shannon,J.D.1999 Regional trends in wet deposition of sulfate in the United States and SO₂ emissions from 1980 through 1995. Atmos. Environ. 33, 807-816

Skjelkvalc, B.L., Wright, R.F. & Henriksen,A. 1998.Norwegian lakes show widespread recovery from acidification; result from national surveys of lakewater chemistry 1986-1997. Hydrol. Earth System Sci. 2, 375-577

Skogheim, O.K. and Rosseland,B.O.1986, Bull. Environ. Contam, Toxicol. 37, 258-265.

Syri,S., Kangas,L. & Johansson, M., 1998: Application of nitrogen tranfer matrices for integrated assessment.-Atmos.Environ. 32: 409-413.

Simola H., Huttunen P., Ronkko J. & Uimonen-Simola P. 1991. Palaeolimnological study of an environmental monitoring area, or, are there pristine lakes in Finland? Hydrobiologia 214: 187-190.

Salonen K., Arvola L. & Rosenberg m. 1993. Diel vertical migrations of phyto- and zooplankton in a small steeply stratified humic lake with low nutrient concentration. Verh. Internat. Verein. Limnol. 25: 539-543.

Smolander U. & Arvola L. 1988. Seasonal variation in the diel vertical distribution of the migratory alga Cryptomonas marssonii (Cryptophyceae) in a small, highly humic lake. Hydrobiologia 161: 89 – 98.

Sommer U., Gaedke U. & Schweizer A. 1993. The first decade of oligotrophication of Lake Constance. The response of phytoplankton taxonomic composition. Oecologia 93: 276 – 284.

Salonen, K. and Hammar, T., On the importance of dissolved organic matter in the nutrition of zooplankton in some lake waters, Oceologia, 68, 246, 1986.

Salonen, K. and Arvola, L., A radiotracer study of zooplankton grazing in two small humic lakes, Verh. Int. Verein Limnol., 23, 462, 1988.

Shindler D.W.et al. 1990. Effects of climatic warming on lakes of the central boreal forest 250. 967-970.

Shindler D. Et.al. 1996. The effects of climatic warming on the properties of boreal lakes and streams at the Experimental Lake Area, northwestern Ontario. Limnal. Oceanogr. 41. 1000-1017

Turner,M.A., Jackson,M.B., Findlay,D.L., Graham,R.W., De Bruyn,E.R. & Vandermeer, E.M. 1987. Early responses of periphyton to experimental lake acidification. Canadian Journal of Fisheries and Aquatic Sciences 44 (Suppl.1), 135-49.

Turner,M.A., Howeil,E.T., Summerby,M., hesslein, R.H., Findlay, D. & Jackson, M. 1991. Changes in epilithic and epiphytic periphyton associated with lake acidification to pH 5. Limnology and Oceanography 36 (in press).

Tarrasson, L.(ed.) 1998.Transboundary Acidifying Air Pollution in Europe (International Cooperative Programme for the Monitoring and Evalution of Long Range Trasmission of Air Pollutants in Europe/Meteorological Synthesizing Centre-West,

TRAAEN T., HENRIKSEN A., MOISEENKO T.I., RAIT R.F. 1992. Lake monitoring, critical load of sulphur and modelling of future acidity for several sulphur reduction scenarios in the Norwegian - Russian border areas // Symposium on the State of the Environmental Monitoring in the Northern Fennoskandia and Kola Peninsula. Rovaniemi, Finland. P.161­164.

Tarvainen T. 1995. The geochemical correlation between coarse and fine fraction of till in southern Finland . Journal of Geochemical Exploration 54: 187-198.

Tenhola M. 1993. Use of lake sediments in sulphur and heavy metal pollution monitoring: example from Finland. Applied Geochem. Suppl. 2: 171 – 173.

Talling J.F. 1993. Comparative seasonal changes, and inter-annual variability and stability, in a 26-year record of total phytoplankton biomass in four English lake basins. Hydrobiologia 268: 65 – 98.

Talling J.& Heaney S.I. 1988. Long-term changes in some English (Cumbrian) lakes subjected to increased nutrient inputs. In: Round F.E. (ed.), Algae and the aquatic environment. Biopress, Bristol, pp. 1 – 29.

United States – Canada, 1981: Memorandum of Intent on Transboundary Air Pollution: Strategies, Development and Implementation. Interim Report, February 1981/

Verta M, Tolonen K, Simola H (1989) History of heavy metal pollution in Finland as recorded by lake sediments. Sci Total Environ 87/88: 1-18

Verta M., J.Mannio, P. Iivonen, J-P. Hirvi, O. Jarvinen, and S. Piepponen. 1990.Trace Matals in Finnish Headwater Lakes – Effects of Acidification and Airborne Load. Kauppi et al.(Eds). Acidification in Finland. Springer-Verlag Berlin Heidelberg

Verta, M., Changes in fish mercury concentration in an intensively fished lake, Can. J. Fish. Aquat. Sci., 47, 1988, 1990.

Verta, M., Mercury in Finnish Forest Lakes and Reservoirs: Anthropogenic Contribution to the Load and Accumulation in Fish, Academic dissertation, Helsinki University, Yliopistopaino, Helsinki, 1990, 140.

Vuorenmaa J. 1997. Trend assessment of bulk and througfall deposition and runoff water chemistry at ICP IM sites. In: Kleemola S. and Forsius M. (eds.), UN ECE Convention on Long-Range Trandboundary Air Pollution. International Co-operative Programme on Integrated Monitoring of Air Pollution Effects on Ecosystems. Finnish Environment Institute. 6^th Annual Report. Finnish Environment 116: 24-42.

Wright, R,Harriman, R,Henriksen, A,Morrison,B, and Leonard, A C, 1980: Acid lakes and streams in the Galloway area, Southwestern Scotland. Pro. Int. Conf. Ecol. Impact Acid Precip., SNSF-project, 248-249/

Watras, C.J. and N.S.Bloom. 1992. Mercury and methylmercury in individual zooplankton: Implications for bioaccumulation. Limnol. Oceanogr. 37: 1313-1318.

Watras, C.J. and N.S.Bloom. 1994. The vertical distribution of mercury species in Wisconsin lakes, p. 137-153. In C.J.Watras and J.W.Huckabee [eds.], Mercury pollution: Integration and synthesis. Lewis.

Watras, C.J. and N.S.Bloom. and others. 1995. Ethylmercury production in the anoxic hypolimnion of a dimictic seepage lake. Water Air Soil Pollut. 80: 735-745.

Webster, K.E., and others. 1992. Complex biological responses to the experimental acidification of Little Rock Lake. Wisconsin, USA. Environ. Pollut. 78: 73-78.

Webster, K.E., T.M.Frost, C.J.Watras, W.A. Swenson, M.Gonzales, and P.J.Garrison. 1992. Complex biological responses to the experimental acidification of Little Rock Lake, Wisconsin, USA. Environmental Pollution 78:73-78.

Wiener, J.G., W.F.Fitzgerald, C.J.Watras, and R.G.Rada. 1990. Partitioning and bioavailability of mercury in an experimentally acidified Wisconsin lake. Environ. Toxicol. Chem. 9: 909-918.

Williamson, C.E.1995. What role does UV-B radiation play in freshwater ecosystems? Limnol. Oceanogr. 40: 386-392.

Williamson, C.E., B.R. Hargreaves, P.S. Orr, and P.A. Lovera. 1999. Does UV radiation play a role in changes in predation and zooplankton community structure in acidified lakes? Limnol. And Oceanogr. 44: 774-783.

Williamson, C.E., R.S. Stemberger, D.P.Morris, T.M.Frost, and S.G.Paulsen. 1996. Ultraviolet radiation in North American lakes: Attenuation estimates from DOC measurements and implications for plankton communities. Limnol. Oceanogr. 41: 1024-1034.