References
- Kirsch , B. , Schmitt , H. and Müser , H. E. 1986 . Ferroelectrics , 68 : 275
- Schmitt , H. and Dörr , A. 1989 . Ferroelectrics , 93 : 309
- Burns , G. and Scott , B. A. 1973 . Solid State Commun. , 13 : 423
- Schmidt , G. 1981 . Ferroelectrics , 31 : 105
- Setter , N. and Cross , L. E. 1980 . J. Phys. Colloq. , 41 : C6 – 419 .
- Smolensky , G. A. 1970 . J. Phys. Soc. Jap. Suppl. , 28 : 26