1. Kuz’minov, Yu.S., Segnetoelektricheskie kristally dlya upravleniya lazernym izlucheniem (Ferroelectrical Crystals for Controlling Laser Radiation), Moscow: Nauka, 1982.
2. Smolenskii, G.A., Bokov, V.A., Isupov, V.A., et al., Fizika segnetoelektricheskikh yavlenii (Physics of Ferroelectrical Phenomena), Leningrad: Nauka, 1985.
3. Isupov, V.A., Ferroelectrics, 1985, vol. 65, p. 181.
4. Cross, L.E., Ferroelectrics, 1994, vol. 151, p. 305.
5. Kleemann, W., J. Mater. Sci., 2006, vol. 41, p. 129.