1. Venevtsev, Yu.N., Gagulin, V.V., and Lyubimov, V.N., Segnetomagnetiki (Ferroelectromagnets), Moscow: Nauka, 1982.
2. Gerasimchuk, V.S. and Sukstanskii, A.L., Phys. Rev. B, 1999, vol. 59, no. 10, p. 6966.
3. Soboleva, T.K., Stefanovskii, E.P., and Sukstanskii, A.L., Fiz. Tverd. Tela, 1984, vol. 26, no. 9, p. 2725 [Sov. Phys. Solid State (Engl. Transl.), vol. 26, no. 9, p. 1651].
4. Gerasimchuk, V.S. and Sukstanskii, A.L., Fiz. Tverd. Tela, 1994, vol. 36, no. 8, p. 2221 [Phys. Solid State (Engl. Transl.), vol. 36, no. 8, p. 1210].
5. Bar’yakhtar, V.G., Ivanov, B.A., and Chetkin, M.V., Usp. Fiz. Nauk, 1985, vol. 146, no. 3, p. 417.