1. V. A. Ogurtsov, Yu. V. Karpychev, O. A. Rakitin, Russ. Chem. Bull. (Int. Ed.), 2008, 57, 1790 [Izv. Akad. Nauk, Ser. Khim., 2008, 1756].
2. Yu. V. Karpychev, Ph.D. Thesis (Chem.), N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, Moscow, 2012, 181 pp. (in Russian).
3. V. A. Ogurtsov, O. A. Rakitin, Russ. Chem. Rev. (Engl. Transl.), 2012, 81, 638 [Usp. Khim., 2012, 81, 638].
4. D. M. McKinnon, in Comprehensive Heterocyclic Chemistry II, 1996, 3, 571; R. Markovic’, A. Rašovic’, in Comprehensive Heterocyclic Chemistry III, 2008, 4, 894.
5. A. M. Likhosherstov, V. P. Peresada, V.G. Vinokurov, A. P. Skoldinov, Zh. Org. Khim., 1986, 22, 2610 [J. Org. Chem. USSR (Engl. Transl.), 1986, 22].