1. Zh. V. Akhmerkina, A. B. Dobrynin, I. A. Litvinov, et al., Zh. Neorg. Khim. 49(9), 1543 (2004).
2. Zh. V. Akhmerkina, A. V. Virovets, E. V. Peresypkina, and L. B. Cerezhkina, Zh. Neorg. Khim. 51(7), 271 (2005).
3. L. B. Serezhkina, E. V. Peresypkina, A. V. Virovets, et al., Crystallogr. Rep. 53(4), 651 (2008).
4. Yu. V. Mikhailov, I. M. Orlova, R. N. Shchelokov, et al., Zh. Neorg. Khim. 51(3), 451 (2006).
5. K. Nakamoto, Infrared and Raman Spectra of Inorganic and Coordination Compounds, 4th ed. (Wiley-Interscience, New York, 1986).