1. A. P. Kapustin and O. A. Kapustina, Acoustics of Liquid Crystals (Nauka, Moscow, 1986) [in Russian].
2. V. A. Balandin, A. N. Larionov, and S. V. Pasechnik, Zh. Éksp. Teor. Fiz. 83, 2121 (1982) [Sov. Phys. JETP 56, 1230 (1982)].
3. V. A. Balandin, S. V. Pasechnik, V. I. Prokop’ev, and O. Ya. Shmelev, Akust. Zh. 33, 583 (1987) [Sov. Phys. Acoust. 33, 342 (1987)].
4. S. V. Pasechnik, V. A. Balandin, V. I. Prokop’ev, et al., Zh. Fiz. Khim. 63, 471 (1989).
5. V. A. Balandin, S. V. Pasechnik, V. I. Prokopjev, and O. Ya. Shmelyoff, Liquid Cryst. 3, 1319 (1988).