1. B. Yaffe, U. Cook, and G. Yaffe, Piezoelectric Ceramics [Russian translation], Mir, Moscow (1974).
2. O. Saburi, Barium Titanate Based Semiconductors [Russian translation], Energoizdat, Moscow (1982).
3. F. Jonna and D. Shirane, Ferroelectric Crystals [Russian translation], Mir, Moscow (1965).
4. B. A. Strukov and A. P. Levanyuk, Physical Principles of Ferroelectric Phenomena in Crystals [in Russian], Nauka, Moscow (1995).
5. Ho Chyan and Fu Shen-Li, J. Mater. Sci., 25, 4699–4703 (1999).