1. M. G. Voronkov, E. V. Bakhareva, and I. G. Kuznetsov, Dokl. Akad. Nauk SSSR,262, 736 (1982).
2. M. G. Voronkov, G. I. Zelchan, and É. Ya. Lukevich, Silicon and Life [in Russian], Riga (1978).
3. I. Ya. Makar, The Biochemical Basis of Wool Productivity of Sheep [in Russian], Moscow (1977).
4. A. G. E. Pearse, Histochemistry, Theoretical and Applied, Little, Brown and Co., Boston (1960).
5. M. G. Voronkov, in: Biochemistry of Silicon and Related Problems, C. Bendz and J. Lindqvist (editors), New York (1978), p. 395.