1. V. A. Reznikov and L. B. Volodarskii,Izv. Akad. Nauk, Ser. Khim., 1994, 292 [Russ. Chem. Bull., 1994,43, 272 (Engl. Transl.].
2. L. B. Volodarskii, V. S. Kobrin, and Yu. G. Putsykin,Khim. Geterotsikl. Soedin., 1972, 1241 [Chem. Heterocycl. Compd., 1972 (Engl. Transl.].
3. I. A. Kirilyuk, I. A. Grigor'ev, and L. B. Volodarskii,Izv. SO Akad. Nauk SSSR, Ser. Khim. Nauk [Bull. Sib. Branch Acad. Sci USSR], 1989,2, 99 (in Russian).
4. V. A. Reznikov and L. B. Volodarskii,Izv. Akad. Nauk, Ser. Khim., 1993, 933 [Russ. Chem. Bull., 1993,42, 891 (Engl. Transl.].