1. G. M. Corcos, J. Acoust. Soc. Am. 35, 192 (1963).
2. A. v. Smol’yakov, Akust. Zh. 16, 291 (1970) [Sov. Phys. Acoust. 16, 241 (1970)].
3. B. M. Efimtsov, Akust. Zh. 28, 289 (1982) [Sov. Phys. Acoust. 28, 173 (1982)].
4. A. V. Smol’yakov and V. M. Tkachenko, Akust. Zh. 37, 1199 (1991) [Sov. Phys. Acoust. 37, 627 (1991)].
5. J. E. Ffowcs Williams, J. Fluid Mech. 125, 9–25 (1982).