1. An ecological and environmental survey of the humic man-made lakes in Finland;Vogt;Aqua Fennica,1978
2. Ph. D. thesis;Koskenniemi,1995
3. On the natural and introduced fish fauna in Finnish inland reservoirs;Koskenniemi,1990
4. The strategy of ecosystem development;Odum;Science,1969
5. Influence of pollution on parasites of aquatic animals;Khan;Adv Parasitol,1991