References
- Leshchenko , M. A. 1990 . Izv. AN SSSR Ser. Fiz. , 54 : 607 (in Russian)
- Leshchenko , M. A. 1990 . Ukr. Phys. Journal , 35 : 1077 (in Russian).
- Leshchenko , M. A. and Poplavko , Yu. M. 1992 . Ukr. Phys. Journal , 37 : 898 (in Russian)
- Leshchenko , M. A. , Poplavko , Yu. M. and Bovtun , V. P. 1992 . Ferroelectrics , 131 : 213