1. L. M. Brekhovskikh, V. V. Goncharov, S. A. Dremuchev, et al., Akust. Zh. 36, 824 (1990) [Sov. Phys. Acoust. 36, 461 (1990)].
2. V. V. Goncharov and V. M. Kurtepov, Akust. Zh. 40, 773 (1994) [Acoust. Phys. 40, 685 (1994)].
3. L. M. Brekhovskikh, V. V. Goncharov, and V. M. Kurtepov, Izv. Akad. Nauk, Fiz. Atmos. Okeana 31, 460 (1995).
4. I. B. Burlakova, V. N. Golubev, Yu. V. Petukhov, and M. M. Slavinskii, Akust. Zh. 36, 362 (1990) [Sov. Phys. Acoust. 36, 198 (1990)].
5. Yu. V. Petukhov, Akust. Zh. 40, 111 (1994) [Acoust. Phys. 40, 97 (1994)].