1. Yu. N. Venevtsev, V. V. Gagulin, and V. N. Lyubimov, Ferroics (Nauka, Moscow, 1982) [in Russian].
2. S. V. Titov, L. A. Reznichenko, et al., Pis’ma Zh. Tekh. Fiz. 26(17), 99 (2000) [Tech. Phys. Lett. 26, 700 (2000)].
3. H. Takeuchi, S. Jyomura, E. Yamamoto, and Y. Ito, J. Acoust. Soc. Am. 72, 1114 (1982).
4. V. A. Murashov, D. N. Rakov, N. A. Ekonomov, et al., Fiz. Tverd. Tela (Leningrad) 32, 2156 (1990) [Sov. Phys. Solid State 32, No. 7 (1990)].
5. O. N. Razumovskaya, I. A. Verbenko, K. P. Andryushin, A. A. Pavelko, and L. A. Reznichenko, Proceedings of Intern. Sci.-Tech. Conf. “Basic Problems of Radioelectronic Instrument Making” (Intermatic-2009) (MIREA, Moscow, 2009), Part 1, pp. 126–131.