1. E. V. Bogatyreva, V. A. Kogan, V. V. Lukov, and V. A. Lokshin, Zh. Neorg. Khim. 35, 2010 (1990).
2. Yu. P. Tupolova, V. V. Lukov, V. A. Kogan, and L. D. Popov, Koord. Khim. 33, 310 (2007).
3. V. V. Lukov, G. G. Aleksandrov, V. A. Dontsova, et al., Koord. Khim. 31, 770 (2005).
4. L. D. Popov, S. I. Levchenkov, I. N. Shcherbakov, and V. A. Kogan, Zh. Obshch. Khim. 77, 1203 (2007).
5. T. A. Yusman, S. G. Kochin, V. V. Lukov, et al., Zh. Neorg. Khim., No. 5, 863 (1993).