References
- Janssen , T. and Tjon , J. A. 1981 . Phys. Rev. B , 24 : 2245
- Slot , J. J. M. and Janssen , T. 1988 . Physica D , 32 : 27
- Slot , J. J. M. and Janssen , T. 1988 . J. Phys. A , 21 : 3559
- Janssen , T. 1972 . Phys. kond. Materie , 15 : 142
- Toledano , J. C. and Toledano , P. 1987 . Landau Theory of Phase Transitions , Singapore : World Scientific .
- Lajzerowicz , J. and Levanyuk , A. P. IMF8 conference, to be published in Ferroelectrics.