1. Handbook of Liquid Crystals, Ed. by D. Demus (Wiley-VCH, Weinheim, 1998).
2. O. Kapustina, J. Acoust. Soc. Am. 123, 3279 (2008).
3. O. A. Kapustina, Kristallografiya 59 (5), 703 (2014) Crystallogr. Rep. 59 (5), 635 (2014).
4. A. P. Kapustin and O. A. Kapustina, Acoustics of Liquid Crystals (Nauka, Moscow, 1986) [in Russian].
5. L. M. Dmitriev and A. P. Kapustin, Kristallografiya, No. 7, 332 (1962).