References
- Castellano , J. A. and Harrison , K. J. 1980 . The. Physics and Chemistry of Liquid Crystal Devices , Edited by: Sprokel , G. J. 263 – 287 . New York : Plenum . See for example: D. Demus and H. Zaschke, Mol. Crystal. Liq. Cryst., 63, 129 (1981)
- Gray , G. W. , Langley , N. A. and Toyne , K. J. 1981 . Mol. Cryst. Liq. Cryst. Letts. , 64 : 239 and the cited therein