1. Avetisyan, A.A., Aleksanyan, I.L., and Ambartsumyan, L.P., Zh. Org. Khim., 2004, vol. 40, p. 434.
2. Warren, L.A. and Smiles, S., J. Chem. Soc., 1930, vol. 957, p. 1327.
3. Ingold, C.K., Structure and Mechanism in Organic Chemistry, Ithaca: Cornell Univ., 1969, 2nd ed. Translated under the title Teoreticheskie osnovy organicheskoi khimii, Moscow: Mir, 1973.
4. March, J., Advanced Organic Chemistry. Reactions, Mechanisms, and Structure, New York: Wiley-Interscience, 1987, vol. 3, p. 114.
5. Org. Synth., 1967, vol. 4, p. 700.