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2. Preliminary investigations of psammon rotifers in two reservoirs in Upper Silesia;I. Bielańska-Grajner;Oceanol. and Hydrobiol. Studies,2004
3. Comparison of psammon rotifers community in lakes of North-western Poland and artificial reservoirs of Upper Silesia;I. Bielańska-Grajner;Oceanological and Hydrobiological Studies,2007
4. Rotifers in relation to littoral ecotone structure in lake Rotomanuka, North Island, New Zealand;I. Duggan;Hydrobiologia,1998