1. V. Ya. Sosnovskikh and I. S. Ovsyannikov,Zh. Org. Khim., 1993,29, 89 [Russ. J. Org. Chem., 1993,29, 74 (Engl. Transl.)].
2. V. Ya. Sosnovskikh,Mendeleev Commun., 1996, 189.
3. V. Ya. Sosnovskikh,Izv. Akad. Nauk, Ser. Khim., 1998, 362 [Russ. Chem. Bull., 1998,47, 354 (Engl. Transl.)].
4. J. R. Merchant, A. R. Bhat, and D. V. Rege,Tetrahedron Lett., 1972, 2061.
5. V. Ya. Sosnovskikh and V. A. Kutsenko,Mendeleev Commun., 1999, 206.