1. Yu. V. Bukin et al., Vestn. Akad. Med. Nauk SSSR, No. 3, 49 (1971).
2. S. A. Burnashova, Biokhimiya, No. 2, 246 (1954).
3. A. A. Dmitrovskii, in: Experimental Vitaminology [in Russian], Minsk (1979), p. 150.
4. A. B. Barua, M. C. Ghosh, and K. Goswami, Biochem. J.,113, 447 (1969).
5. F. W. Berunhart and R. M. Tomarelli, J. Nutr.,89, 495 (1966).