1. Smolenski, G.A. and Yudin, V.M., Sov. Phys. Solid State, 1965, vol. 6, no. 12, p. 3668.
2. Catalan, G. and Scott, F., Adv. Mater., 2009, vol. 21, p. 2463.
3. Pyatakov, A.P. and Zvezdin, A.K., Phys.—Usp., 2012, vol. 55, no. 6, p. 557.
4. Karimi, S., Reaney, I.M., Han, Y., Pocorny, J., and Sterianoy, I., J. Mater. Sci., 2009, vol. 44, p. 5102.
5. Verbenko, I.A. and Reznichenko, L.A., in Tr. II Mezhdun. molodezhnogo simp. “Fizika bessvintsovykh p’ezoaktivnykh i rodstvennykh materialov (Analiz sovremennogo sostoyaniya i perspektivy razvitiya)” (Proc. II Int. Youth Symp. “Physics of Lead-Free Piezoactive and Related Materials (State-of-the-Art and Prospects)”), Rostov-on-Don, 2013, vol. 1, no. 2, p. 65.