1. Cotter M (1970) In: Luckhurst GR, Gray GW (eds) Molecular Physics of Liquid Crystals. Academic Press, London New York San Francisco, p 169
2. Gelbart WM (1982) J Phys Chem 86:4298
3. Tschierske C (1998) J Mater Chem 8:1485
4. Weissflog W (1998) In: Demus D, Goodby J, Gray GW, Spiess HW, Vill V (eds) Handbook of Liquid Crystals, Wiley VCH, Weinheim, p 855/chap XI/ vol 2B.
5. Nguyen HT, Destrade C, Malthete J (1998) In: Demus D, Goodby J, Gray GW, Spiess HW, Vill V (eds) Handbook of Liquid Crystals, Wiley VCH, Weinheim, p 865/chap XII/vol 2B.