References
- Janovec , V. , Richterova , L. and Litvin , D. B. 1992 . Ferroelectrics , 126 : 287
- Janovec , V. , Richterova , L. and Litvin , D. B. 1993 . Ferroelectrics , 140 : 95
- Zamorzaev , A. M. and Sokolov , E. I. 1957 . Sov. Phys. Crystallography , 2 : 5
- Janovec , V. 1972 . Czech. J. Phys. , B22 : 974
- Litvin , D. B. , Litvin , S. Y. and Janovec , V. to be published.
- Zamorzaev , A. M. 1976 . The Theory of Simple and Multiple Antisymmetry , Kishinev : Publishing House . in Russian
- Schmid , H. 1975 . Magnetoelectric Interaction Phenomena in Crystals , Edited by: Schmid , H. 121 New York : Gordon and Breach .
- Litvin , D. B. , Janovec , V. and Litvin , S. Y. 1993 . unpublished.
- O'Dell , T. H. 1970 . The Electrodynamics of Magneto-electric Media , Amsterdam : North-Holland Publishing CO. .
- Birss , R. R. 1964 . Symmetry and Magnetism , Amsterdam : North-Holland Publishing Co. .
- Sirotin , Yu. and Shaskolskaya , M. P. Osnovi Kristallogfiziki, Nauka, Moscow, 1975. (English Translation: Fundamentals of Crystal Physics, Mir, Moscow, 1982).
- Litvin , D. B. 1994 . Acta Crystallographica , A50 : 406