1. Shabanova, N.A., Popov, V.V., and Sarkisov, P.D., Khimiya i tekhnologiya nanodispersnykh oksidov (Chemistry and Technology of Nanodispersed Oxides), Moscow: Akademkniga, 2006.
2. Lines, M. and Glass, A., Principles and Applications of Ferroelectrics and Related Materials, Oxford: Clarendon Press, 1979; Moscow: Mir, 1981.
3. Milovidova, S.D., Rogazinskaya, O.V., Sidorkin, A.S., et al., Bull. Russ. Acad. Sci. Phys., 2010, vol. 74, no. 9, p. 1295.
4. Maslov, V.V., Tryukhan, T.A., and Baryshnikov, S.V., Izv. Ros. Gos. Ped. Univ. im. A.I. Gertsena, 2010, no. 122, p. 84.