1. L. M. Brekhovskikh and O. A. Godin, Acoustics of Layered Media (Nauka, Moscow, 1989; Berlin, Springer, 1990).
2. W. M. Ewing, W. S. Jardetzky, and F. Press, Elastic Waves in Layered Media (McGraw-Hill, New York, 1957).
3. L. A. Molotkov, in Computational Methods in Geophysics (Radio i Svyaz’, Moscow, 1981).
4. L. A. Molotkov, The Matrix Method in the Theory of Wave Propagation in Elastic and Fluid Layered Media (Nauka, Leningrad, 1984).
5. M. M. Machevariani, V. V. Tyutekin, and A. P. Shkvarnikov, Akust. Zh. 17, 97 (1971) [Sov. Phys. Acoust. 17, 77 (1971)].