1. N. G. Bogdanov, in: Experimental Vitaminology [in Russian], Minsk (1979), pp. 58?79.
2. G. Ya. Vidershain, Mol. Biol., No. 5, 957 (1976).
3. P. N. Sharaev, Vopr. Pitan., No. 3, 66 (1977).
4. P. N. Sharaev, N. G. Bogdanov, and A. I. Nurkaeva, Cor Vasa,19, 140 (1977).
5. C. T. Esmon, J. A. Sadowski, and J. W. Suttie, J. Biol. Chem.,250, 4744 (1975).