1. V. É. Kampar and O. Ya. Neiland, Usp. Khim. 46, 945 (1977).
2. E. C. Chen and W. E. Wentworth, J. Chem. Phys. 63, 3183 (1975).
3. R. P. Shibaeva and L. O. Atovmyan, Zh. Strukt. Khim. 13, 546 (1972).
4. B. P. Bespalov and V. V. Titov, Usp. Khim. 44, 2249 (1975).
5. L. A. Chetkina, E. G. Popova, V. M. Vozzhennikov, and B. V. Kotov, Zh. Strukt. Khim. 17, 114 (1976).