1. V. I. Pet’kov, G. I. Dorokhova, and A. I. Orlova, Kristallografiya 46(1), 76 (2001) [Crystallogr. Rep. 46 (1), 69 (2001)].
2. J. Alamo, Solid State Ionics 63, 547 (1993).
3. A. Jouanneaux, A. Verbaere, Y. Piffard, et al., Eur. J. Solid State Chem. 28, 683 (1991).
4. V. I. Pet’kov, E. A. Asabina, A. V. Markin, et al., J. Therm. Anal. Cal. 80, 695 (2005).
5. V. I. Pet’kov, A. I. Orlova, G. I. Dorokhova, and L. V. Fedotova, Kristallografiya 45(1), 36 (2000) [Crystallogr. Rep. 45 (1), 30 (2000)].