References
- Hochli , U. T. , Knorr , K. and Loidl , A. 1990 . Adv. Phys. , 39 : 405 – 615 .
- Voigt , P. and Kapphan , S. 1994 . J. Phys. Chem. Solids , 55 : 853
- Gervais , F. 1983 . High-Temperature Infrared Reflectivity Spectroscopy by Scanning Interferometry , 280 New York : Academic Press . Chapter in a Book: K. J. Button Infrared and Millimeter Waves. Vol. 8
- Vogt , H. 1995 . Phys. Rev. B , 51 : 8046 – 8059 .
- Vogt , H. 1997 . Ferroelectrics , 202 : 157 – 163 .