1. L. M. Brekhovskikh, Waves in Layered Media (Nauka, Moscow, 1973; Academic, New York, 1980).
2. R. J. Urick, J. Acoust. Soc. Am. 52, 993 (1972).
3. O. V. Kudryavtsev and V. I. Bychikhin, in Proceedings of the 7th All-Union Conference on Information Acoustics (Moscow, 1981), p. 156.
4. V. A. Gordienko, E. L. Gordienko, L. N. Zakharov, and V. I. Il’ichev, Dokl. Akad. Nauk 333, 503 (1993).
5. N. N. Komissarova, Acoust. Phys. 47, 313 (2001).