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2. M. Kleman, Points, Lines, and Walls (Wiley, New York, 1983)
3. P. Cladis, P. Palffy-Muharay (eds.), Dynamics and Defects in Liquid Crystals, A Festschrift in Honour of Alfred Saupe (CRC Press, 1998)
4. I. Dierking, Textures of Liquid Crystals (Wiley-VCH, Verlag, 2003)
5. G. W. Gray, Structures and Textures of Liquid Crystals (CRC Press, 2003)