1. Rodd’s Chemistry of Carbon Compounds, Ansell, M.F., New York: Elsevier, 1983, vol. 3, part A.
2. Dneprovskii, A.S. and Temnikova, T.I., Teoreticheskie osnovy organicheskoi khimii (Theoretical Fundamentals of Organic Chemistry), Leningrad: Khimiya, 1979.
3. Organic Syntheses, 1946, coll. vol. 2. Translated under the title Sintezy organicheskih preparatov, Moscow: Inostrannaya Literatura, 1949, vol. 2, pp. 398, 665.
4. Osamura, Y., Terada, K., Kobayashi, Y., Okazaki, R., and Ishiyama, Y., Theochem., 1999, vol. 461, p. 399.
5. Scholz, G., J. Mol. Struct., 1994, vol. 309, p. 227.