61. Chiellini E, Laus M, Handbook of Liquid Crystals, Demus D, Goodby J, Gray GW, Spiess HW, Vill V, Editors, Wiley-VCH, Weinheim-New York, Vol 3, Chap. 2, p 26 (1998)
62. Donald AM, Windle AH, Liquid Crystal Polymers, Cambridge University Press, Cambridge, Chap. 3, p 50 (1992)
63. Tokita M, Watanabe J, Polym. J., 38, 611 (2006)