References
- Chandrasekhar , S. 1977 . Liquid Crystals , 140 Cambridge .
- Cladis , P. E. and Torza , S. 1975 . Phys. Rev. Lett , 35 : 1283
- Pieranski , P. and Guyon , E. 1974 . Phys. Rev. Lett , 32 : 924
- Meiboom , S. and Hewitt , R. C. 1973 . Phys. Rev. Lett , 30 : 261
- Gähwiller , Ch. 1972 . Phys. Rev. Lett , 28 : 1554
- Wahl , J. and Fischer , F. 1973 . Mol. Cryst. Liq. Cryst. , 22 : 359
- Holmström and Lagervall , S. T. 1977 . Mol. Cryst. Liq. Cryst , 38 : 141
- Stephen , M. and Straley , J. 1974 . Rev. Mod. Phys , 46 : 617
- Karat , P. P. and Madhusudana , N. V. 1976 . Mol. Cryst. Liq. Cryst. , 36 : 51