1. Borisevich, A.N. and Pel’kis, P.S., Zh. Org. Khim., 1965, vol. 1, p. 1052.
2. Borisevich, A.N., Samoilenko, L.S., Lozinskii, M.O., Rusanov, E.B., and Chernega, A.N., Zh. Obshch. Khim., 2001, vol. 71, p. 1866.
3. Borisevich, A.N. and Pel’kis, P.S., Khim. Geterotsikl. Soed., 1979, p. 1479.
4. Britsun, V.N., Borisevich, A.N., Samoilenko, L.S., and Lozinskii, M.O., Zh. Org. Khim., 2005, vol. 41, p. 292.
5. Katritzky, A.R., Comprehensive Heterocyclic Chemistry, New York: Pergamon Press, 1984, p. 425.