1. Almer, B., W. Dickson, C. Ekström & E. Hörnström, 1978. Sulfur pollution and the aquatic ecosystem. In Sulfur in the environment; part II. In J. O. Nriagu (ed.), Ecological impacts. Publ. John Wiley & Sons Inc.: 273?286.
2. Appelberg, M., 1984. Early development of Astacus astacus L. in acid water. Rep. Inst. Freshw. Res., Drottningholm, (in press).
3. Baker, J. P. & C. L. Schofield, 1980. Aluminium toxicity to fish as related to acid precipitation and Adirondack surface water quality. In D. Drablös & A. Tollan (eds.), Proc., Int. conf. ecol. impact acid precip. Norway 1980, SNSF-project: 292?293.
4. Beamish, R. J. & H. H. Harvey, 1972. Acidification of the La Cloche Mountain Lakes, Ontario, and resulting fish mortalities. J. Fish Res. Bd Can. 31: 49?54.
5. Dejours, P. & J. Armand, 1982. Variations de l'équilibre acidebase de l'hemylymphe d'Ecrivisse en fonction des changements de certaines proprietes physico-chimiques des l'eau ambiante. C.R. Acad. Sci. Paris 295: 509?512.