References
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- KALmAN , P. and Toth , A. 1987 . Ferroelectrics , 75 : 173
- TURi , L. , Kalman , P. and Toth , A. 1989 . Ferroelectrics , 99 : 239
- Grinberg , Y. and Jacobson , A. D. 1976 . J. Opt. Soc. Am. , 66 : 1003