1. R. K. Bartlett, L. V. Renny, and K. K. Chan, J. Chem. Soc., 129 (1969).
2. S. V. Vinogradova, S. A. Siling, and V. N. Solov'ev (W. N. Solowjöw), Macromolec. Chem.,177, 1905 (1976).
3. S. A. Siling, I. I. Ponomarev, V. V. Kuznetsov, B. V. Lokshin, S. V. Vinogradova, and V. V. Korshak, Paper deposited at VINITI, No. 452-83.
4. K. Ride, Course in Physical Organic Chemistry [Russian translation], Mir, Moscow (1972), p. 331.
5. B. A. Geller, Usp. Khim.,68, 537 (1978).