Perkowska A., Protasowicki M., 1999. Mercury in fishes and in selected elements of the świdwie lake ecosystem. Acta Ichthyol. Piscat. 29 (2): 31-41.
The paper demonstrates concentration and distribution of mercury in selected elements of the świdwie lake ecosystem: sediment, surface and rain water, fish tissues (gills, kidney, liver, muscles, alimentary tract and its contents-of rudd, perch, roach, white bream, and pike); duckweed, bladderwort; leaves, stems, and roots of reed and cattail.