1. G. R. Allen, Organic React., Wiley Interscience, New York, 1973, 20, 337.
2. V. G. Granik, V. M. Lyubchanskaya, and T. I. Mukhanova, Khim.-Farm. Zhurn., 1993, 27, No. 6, 37 [Pharm. Chem. J., 1993, 27, No. 6 (Engl. Transl.)].
3. V. G. Granik, Organicheskaya khimiya [Organic Chemistry], Vuzovskaya kniga, Moscow, 2003, 191–275 (in Russian).
4. W. J. Houlihan, Chem. Heterocycl. Compd., 1972, 25.
5. E. A. Titov and A. S. Grishchenko, Khimiya Geterotsikl. Soedinen., 1972, 872 [Chem. Heterocycl. Compd., 1972 (Engl. Transl.)].