1. V. I. Anisimkin, M. A. Magomedov, and V. I. Fedosov, Pis’ma Zh. Tekh. Fiz. 11(1), 56 (1985) [Sov. Tech. Phys. Lett. 11, 24 (1985)].
2. Yu. V. Gulyaev and F. S. Khikirnell, Akust. Zh. 51, 101 (2005) [Acoust. Phys. 51, 81 (2005)].
3. T. Sato and H. Abe, Proc. IEEE Ultrason. Symp., p. 305 (1995).
4. V. I. Grigor’evskii and Yu. V. Gulyaev, Akust. Zh. 46, 475 (2000) [Acoust. Phys. 46, 405 (2000)].
5. T. C. Lim and G. W. Farnell, J. Acoust. Soc. Am. 41, 845 (1969).