1. B. Jaffe, W.R. Cook, and H. Jaffe, Piezoelctric Ceramics (New York: Academic Press, 1971).
2. A. Sen, A. Seal, N. Das, R. Majumder and H.S. Maiti, Proceedings of International Conference on Smart Materials Structures and Systems, ISSS (2005).
3. H. Maiwa, S. Kim, and N. Ichinose, Appl. Phys. Lett. 83, 4396 (2003).
4. A.J. Moulson and J.M. Herbert, Electroceramics: Materials Properties, Application (London: Chapman and Hall, 1990).
5. X. Lin and F.G. Yuan, Smart Mater. Struct. 10, 907 (2001).