1. Textbook on Research in Nutrition and Public Health. Edited by A. A. Pokrovskii, [in Russian], Moscow 1964, p. 159.
2. Ibid. Textbook on Research in Nutrition and Public Health. Edited by A. A. Pokrovskii, [in Russian], Moscow, pp. 103, 144, 170, 201.
3. J. W. Clitherow, M. Mitchard, and N. J. Harper, Nature,199 (1963), p. 1000.
4. B. S. Gould, Vitam, and Horm.,18, (1960), p. 89.
5. E. Kask, Angiology,13 (1962), p. 35.