1. K Itoh and T Mitsui,Ferroelectrics 5, 235 (1973)
2. M I Kay and R Klienberg,Ferroelectrics 5, 45 (1973)
3. M E Lines and A M Glass,Principles of ferroelectrics and related materials (Clarendon Press, Oxford, 1977) pp. 321–327
4. R Chitra, Rajul Ranjan Choudhury, M A K Azad, A K M Zakaria, P U Sastry, H Rajagopal, A Sequeira, R Jayavel and M Ramanadham,XXX National Seminar on Crystallography (Tirupati, India, 2000) p. 46
5. Rajul Ranjan Choudhury, R Chitra, M Ramanadham and R Javeyl,Appl. Phys. A74, [Suppl] S1667 (2002)