1. S. Yu. Ryabova, L. M. Alekseeva, V. G. Granik, Mendeleev Commun., 1995, No 3, 107.
2. S. Yu. Ryabova, L. M. Alekseeva, V. G. Granik, Khim.-Farm. Zhurn., 1996, 30, No. 9, 29 [Pharm. Chem. J. (Engl. Transl.), 1996, 579].
3. M. D. Mashkovskii, Lekarstvennye sredstva [Medicinal Agents], issue 13, Torgsin, Kharkov, 1997 (in Russian).
4. V. G. Granik, Lekarstva. Farmakologicheskii, biokhimicheskii i khimicheskii aspekty [Drugs. Pharmocological, Biochemical, and Chemical Aspects], Vuzovskaya kniga, Moscow, 2001, 406 pp. (in Russian).
5. A. Sausins, G. Duburs, Heterocycles, 1988, 27, 269.