1. P. P. Fedorov and B. P. Sobolev, Kristallografiya 37 (5), 1210 (1992).
2. P. P. Fedorov, G. A. Lovetskaya, G. V. Zimina, and B. P. Sobolev, Zh. Neorg. Khim. 31 (3), 768 (1986).
3. I. I. Buchinskaya and P. P. Fedorov, Usp. Khim. 73 (4), 404 (2004).
4. I. I. Buchinskaya, P. P. Fedorov, and B. P. Sobolev, SPIE: Solid State Crystals: Growth and Characterization, Zakopane, Poland, 1996), Vol. 31, p. 59.
5. P. P. Fedorov, Russ. J. Inorg. Chem. 55 (11), 1722 (2010).