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3. N. A. Platé and V. P. Shibaev, Comb-Like Polymers and Liquid Crystals (Nauka, Moscow, 1980) [in Russian].
4. L. F. Fieser and M. Fieser, Advanced Organic Chemistry (Reinhold, New York, 1961; Khimiya, Moscow, 1966).
5. Ja. S. Freidzon, A. V. Kharitonov, V. P. Shibaev, and N. A. Platé, Mol. Cryst. Liq. Cryst. 88(1/4), 87 (1982).