1. P. G. de Gennes, The Physics of Liquid Crystals (Clarendon Press, 1974).
2. S. Chandrasekhar, Liquid Crystals (Cambridge Univ. Press, 1977).
3. S. A. Pikin and V. L. Indenbom, Ferroelectrics 20, 151 (1978).
4. V. L. Indenbom and S. A. Pikin, Sov. Phys. Usp. 21, 487 (1978).
5. Ferroelectric Liquid Crystals, Ed. by J. W. Goodby (Gordon and Breach, New York, 1992).