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2. Food and Agricultural Organisation of the United Nations/World Health Organisation. Joint FAO/WHO food standard program;Codex Alimentarius Commission,1989
3. 137Cs and 54Mn in hydrobionts of some lakes in Kamchatka;Fleishman;Zh. evol. biochem. physiol.,1968
4. Alkali Elements and Their Radioactive Isotopes in Aquatic Ecosystems;Fleishman,1982
5. Freshwater and alpine ecosystems response to Chernobyl fallout in Norway;Gunnerod,1990