1. Zvezdin, A.K., Loginov, A.S., Meshkov, G.A., and Pyatakov, A.P., Izv. Ross. Akad. Nauk, Ser. Fiz., 2007, vol. 71, no. 1, p. 1604.
2. Fesenko, E.G., Semeistvo perovskita i segnetoelektrichestvo (Rerovskite Family and Ferroelectricity), Moscow: Atomizdat, 1972.
3. Venevtsev, Yu.N., Gagulin, V.V., and Lyubimov, V.N., Segnetomagnetiki (Ferroelectromagnets), Moscow: Nauka, 1982.
4. Mitoseriu, L., Piaggio, P., Nani, P., and Carnasciali, M.M., Appl. Phys. Lett., 2002, vol. 81, p. 5006.
5. Ivanov, S.A., Erricsson, S.-G., Tellgren, R., and Rundlof, H., Mat. Res. Bull., 2004, vol. 39, p. 2317.