1. Yu. V. Petukhov and A. A. Khil’ko, Akust. Zh. 54, 796 (2008) [Acoust. Phys. 54, 689 (2008)].
2. Yu. V. Petukhov and A. A. Khil’ko, Akust. Zh. 54, 981 (2008) [Acoust. Phys. 54, 854 (2008)].
3. T. Akal, C. Ferla, D. R. Jackson, W. S. Hodgkiss, W. A. Kuperman, and H. C. Song, J. Acoust. Soc. Am. 105, 1597 (1999).
4. V. A. Grigor’ev and V. M. Kuz’kin, Akust. Zh. 51, 352 (2005) [Acoust. Phys. 51, 292 (2005)].
5. M. Fink, IEEE Trans. Ultrasonic, Ferroelectr. Freq. Control 39, 555 (1992).