1. Sargsyan, M.S. and Kon’kova, S.G., Khim. Zh. Arm., 2005, vol. 58, no. 3, p. 45.
2. Bergmann, E.D. and Kaluszyner, A., Recl. Trav. Chim. Pays-Bas, 1959, vol. 78, p. 331.
3. Rabe, P. and Else, F., Justus Liebigs Ann. Chem., 1902, vol. 323, p. 83.
4. Sorokin, V.V., Kuz’min, M.V., Smirnova, N.S., Kozhevnikova, N.I., and Kriven’ko, A.P., Zh. Org. Khim., 1994, vol. 30, no. 4, p. 528.