1. J. F. Nye, Physical Properties of Crystals, Oxford U.P, Oxford (1957).
2. Electrocomponent Science Monographs;JM Herbert,1982
3. T. T. Wang, J. M. Herbert, and A. M. Glass (eds.), The Applications of Ferroelectric Polymers, Blackie, London (1987).
4. R. W. Whatmore, Pyroelectric devices and materials, Rep. Prog. Phys.
49, 1335 - 1386 (1986).