1. V. Ya. Kavun, V. I. Sergienko, and N. F. Uvarov, Zh. Strukt. Khim., 44, No.5, 865–870 (2003).
2. V. Ya. Kavun, N. A. Didenko, I. A. Tkachenko, et al., Vestn. Dalnevost. Otd. Ross. Akad. Nauk, 4, No.6, 47–62 (2002).
3. V. Ya. Kavun, V. I. Sergienko, B. N. Chernyshov, et al., Zh. Neorg. Khim., 36, No.4, 1004–1010 (1991).
4. D. G. Ëpov and M. A. Mikhailov, ibid., 22, No.4, 967–971 (1977).
5. V. Ya. Kavun, S. P. Gabuda, S. G. Kozlova, and R. L. Davidovich, Zh. Strukt. Khim., 40, No.4, 664–672 (1999).