1. V. A. Pestegova, L. N. Vol'skii, Zh. V. Dubovenko, and N. A. Gershtein, Khim. Prir. Soedin., 382 (1965).
2. Yu. A. Poltavchenko, Author's Abstract of Candidate's Dissertation, Irkutsk (1974), p. 24.
3. R. I. Deryuzhkin, M. V. Livadin, and V. G. Latysh, Nauchn. Tr. VLTI,33 (1970).
4. R. D. Kolesnikova, V. V. Latysh, L. V. Krasnoboyarova, and R. I. Deryuzhkin, Khim. Prir. Soedin., 456 (1976).
5. L. I. Gornostaeva, S. M. Repyakh, and E. D. Levin, Khim. Prir. Soedin., 784 (1977).