1. B. D. Grishchuk, N. G. Prodanchuk, P. M. Gorbovoi, V. N. Nivalov, and V. G. Sinchenko,Khim.-Farm. Zh., No. 11, 25 (1990).
2. M. Ya. Marova, M. G. Voronkov, and B. N. Dolgov,Zh. Prikl. Khim.,30, No. 4, 650 (1957).
3. J. E. Noll,J. Am. Chem. Soc.,77, No. 11, 3149 (1955).
4. J. E. Noll, US Patent No. 2,762,826 (1956);
5. Chem. Abstr.,51, 5827 (1957).