1. B. Z. Gorbunov, V. S. Kozlov, and Yu. I. Naberukhin, Zh. Strukt. Khim.,16, 808 (1975).
2. B. Z. Gorbunov and Yu. I. Naberukhin, Zh. Strukt. Khim.,16, 816 (1975).
3. Yu. I. Naberukhin and S. I. Shuiskii, Zh. Strukt. Khim.,8, 606 (1967).
4. Yu. I. Naberukhin and V. A. Rogov, Usp. Khim.,40, 369 (1971).
5. B. Z. Gorbunov and Yu. I. Naberukhin, Zh. Strukt. Khim.,13, 20 (1972).