Kozhushko, B. N.; Paliichuk, Yu. A.; Negrebetskii, V. V.; Shokol, V. A.
J. Gen. Chem. USSR (Engl. Transl.), 1980 , vol. 50, # 5 p. 998 - 1006,795 - 802
Byron, D. J.; Matharu, A. S.; Rees, M.; Wilson, R. C.
Molecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals, 1995 , vol. 258, p. 229 - 238