References
- Cross , L. E. 1987 . Ferroelectrics , 76 : 241
- Kirllov , V. and Isupov , V. 1973 . Ferroelectrics , 5 : 3
- Viehland , D. , Jang , S. J. , Cross , L. E. and Wutting , M. 1990 . J. Appl. Phys. , 68 : 2916
- Zhong-Yang , Cheng . 1995 . Ph.D Dissertation Xian Jiaotong University .