1. Herbert, J. R., Ferroelectric Transducers and Sensors. Gordon and Breach, New York, 1984.
2. Lines, M. E. and Glass, A. M., Principles and Applications of Ferroelectrics and Related Materials. Oxford University Press, Oxford, 1977.
3. TEM study of the disorder-order perovskite, Pb(In1/2Nb1/2)O3