References
- P. Simova and M. Petrov, J. Phys. D: Appl. Phys., 12, 2203 (1979).
- P. Simova and M. Petrov, J. Phys. D: Appl. Phys., 14, 1 (1981).
- P. Simova and M. Petrov, Phys. Stat. Sol. (a), 80, K 153 (1983).
- M. Petrov and P. Simova, J. Phys. D: Appl. Phys., 18, 239 (1985).
- P. Simova and M. Petrov, Mol. Cryst. Liq. Cryst., 74, 275 (1981).
- M. Petrov and P. Simova, Phys. Stat. Sol. (a), 95, K 165 (1986).
- M. E. Neubert and A. de Vries, Mol. Cryst. Liq. Cryst., 145, 1 (1987).
- P. Simova, N. Kirov, M. Fontana and H. Ratajczak, Atlas of Vibrational Spectra of Liquid Crystals, World Scientific, Singapore, 1988.