1. Gutsulyak, B.M., Russ. Chem. Rev. 1972, vol. 41, p. 187.
2. Kim, D.G., Brisyuk, N.P., and Lykasova, E.A., Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol., 1991, vol. 34, p. 120.
3. Gyul’budagyan, L.V., Aleksanyan, I.L., and Avetisyan, A.A., Arm. Khim. Zh., 1989, vol. 42, p. 636.
4. Ukrainets, I.V., Sidorenko, L.V., Gorokhova, O.V., Shishkina, S.V., and Turov, A.V., Chem. Heterocycl. Compd., 2007, vol. 43, no. 5, p. 617.
5. Ukrainets, I.V., Mospanova, E.V., Dzharadat, N.A., Bevz, O.V., and Turov, A.V., Chem. Heterocycl. Compd., 2012, vol. 48, no. 9, p. 1347.