1. D. A. Filippov, V. M. Laletin, and G. Srinivasan, Tech. Phys. 57, 44 (2012).
2. Ferroelectrics—Physical Effects, Ed. by M. Lallart (InTech, Shanghai, 2011).
3. I. V. Linchevskiy, O. N. Petrischev, and V. A. Trohimets, Ukr. J. Phys. 55, 947 (2010).
4. I. V. Linchevskiy and O. N. Petrischev, Ukr. J. Phys. 56, 496 (2011).
5. I. V. Linchevskii, T. I. Shevchenko, and V. D. Tron’ko, Opt. Spectrosk. 114, 112 (2013).