1. M. P. Tonkonogov, Usp. Fiz. Nauk, 168, No. 1, 29–54 (1998).
2. M. Lains and A. Glass, Ferroelectrics [Russian translation], Mir, Moscow (1981).
3. G. Young and R. E. Salomon, J. Chem. Phys., 48, No. 4, 1635–1644 (1968).
4. R. H. Coul and O. Worz, Proc. Symposium of Physics of Ice, Munich, Germany (1969).
5. A. A. Potapov and M. S. Metsik, Dielectric Polarization [in Russian], Izd. Irkutsk University, Irkutsk (1986).