1. N. G. Millerson, The Japanese Flowering Quince in the Latvian SSR. Improvement in the Technology of Storing and Processing the Food Material [in Russian], Tr. LSKhA, No. 248 (1988), p. 46.
2. The Chemical Composition of Food Products. Book 2: Comparative Tables of Contents of Amino Acids, Fatty Acids, Vitamins, Macro- and Microelements, Organic Acids, and Carbohydrates [in Russian], Moscow (1987).
3. Methods for the Biochemical Investigation of Plants [in Russian], Leningrad (1987), pp. 128, 138.
4. Biochemistry: A Practical Handbook [in Russian], Kiev (1988), p. 21.
5. S. Yu. Gel'fand, S. V. D'yakonova, and T. N. Medvedeva, Principles of the Quality Control of Production and the Technical and Chemical Supervision of the Preserving Industry [in Russian], Moscow (1987), p. 134.