1. K. S. Aleksandrov, B. P. Sorokin, and S. I. Burkov, Efficient Piezoelectric Crystals for Acoustoelectronics, Piezotechnology and Sensors (Sib. Otd. RAN, Novosibirsk, 2007), Vols. 1, 2 [in Russian].
2. K. Hashimoto, M. Katoda, T. Nakao, et al., in Proc. 2011 IEEE Int. Ultrasonic Symp., Orlando, FL, USA, Oct. 18–21, 2011 (IEEE, New York, 2011), p.79.
3. B. D. Zaitsev, S. G. Joshi, and I. E. Kuznetsova, IEEE Trans. Ultrason. Ferroelectr. Freq. Control 46, 1298 (1999).
4. V. I. Anisimkin, IEEE Trans. Ultrason. Ferroelectr. Freq. Control 61, 120 (2014).
5. I. E. Kuznetsova, B. D. Zaitsev, and S. G. Joshi, in Proc. 2001 IEEE Ultrasonic Symp., Atlanta, GA, USA, Oct. 7–10, 2001 (IEEE, New York, 2001), Vol. 1, p. 157.