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2. A. I. Ermakov, Methods for the Biochemical Investigation of Plants [in Russian], Kolos, Leningrad (1972).
3. T. Y. Lin; Methods Enzymol.,25, 44 (1972).
4. I. M. Skurikhina (ed.), The Chemical Composition of Food Products [in Russian], Agropromizdat, Moscow (1987).