1. Glotova, T.E., Nakhmanovich, A.S., and Sigalov, M.V., Zh. Org. Khim., 1988, vol. 24, no. 10, p. 2151.
2. Babichev, F.S., Kovtunenko, V.A., Tyl’tin, A.K., and Lelyukh, I.G., Khim. Geterotsikl. Soed., 1977, vol. 13, no. 8, p. 1132.
3. Hassan, A.Y., Phosphorus, Sulfur, Silicon, Relat. Elem. 2009, vol. 184, no. 11, p. 2759.
4. Potts, K.T. and Kanemasa, S., J. Org. Chem. 1979, vol. 44, no. 22, p. 3803.