1. B. Jaffe, W. R. Cook, Jr. and H. Jaffe, “Piezoelectric Ceramics” (Academic Press, New York, 1971).
2. R. C. Buchanan, “Ceramic Materials for Electronics” (Marcel Dekker, New York, 1986) p. 154.
3. L. M. Levinson, “Electronic Ceramics Properties, Devices, Applications” (Marcel Dekker, New York, 1987). p. 371.
4. T. Shiosaki, Ferroelectrics
91 (1989) 39.
5. K. Uchino, Ceram. Bull.
65 (1986) 4.