1. Yashna, O.G., Gavrilova, L.D., Rudnov, S.A., and Vereshchagin, L.I., Zh. Org. Khim., 1970, vol. 6, p. 971.
2. JPN Patent Appl. no. 55-76832; Ref. Zh. Khim., 1982, no. 2N35P.
3. Bogatskii, A.V., Kotlyar, S.A., and Klimova, E.I., Ukr. Khim. Zh., 1985, vol. 51, p. 1206.
4. Gasanov, A.G. and Nagiev, A.V., Zh. Org. Khim., 1994, vol. 30, p. 707.
5. Mamedov, M.K., Nabieva, E.K., and Rasulova, R.A., Russ. J. Org. Chem., 2005, vol. 41, p. 974.