1. Sergeev, G.B., Usp. Khim., 2001, vol. 70, no. 10, p. 915.
2. Gen, M.Ya., Usp. Khim., 1969, no. 12, p. 2249.
3. Comprehensive Organic Chemistry, Barton, D. and Ollis, W.D., Eds., Oxford: Pergamon, 1979, vol. 1. Translated under the title Obshchaya organicheskaya khimiya, Moscow: Khimiya, 1981, vol. 1, p. 268.
4. Surette, J.K.D., MacDonald, M., Zaworotko, M.J., and Singer, R.D., J. Chem. Crystallogr., 1994, vol. 24, no. 10, p. 715.
5. Fronczek, F.R. and Erickson, M.S., J. Chem. Crystallorg., 1995, vol. 25, no. 11, p. 737.