1. P.J. Collings, M. Hird, Introduction to Liquid Crystals Chemistry and Physics (Taylor and Francis, London, 1997)
2. D. Demus, J.W. Goodby, G.W. Gray, H.W. Spiess, V. Vill, Handbook of Liquid Crystals’ (Wiley-VCH, Chichester, 1998)
3. P.J. Collings, J.S. Patel, Handbook of Liquid Crystal Research (Oxford University Press, Oxford, 1997)
4. M.R. Fisch, S. Kumar, Liquid Crystals: Experimental Study of Physical Properties and Phase Transitions (Cambridge University Press, New York, 2001)
5. H.K. Bisoyi, S. Kumar, Chem. Soc. Rev. 39, 264 (2010)