1. K. Kellner and A. Tzschach,Z. Chem., 1984,24, 365.
2. B. A. Arbuzov and G. N. Nikonov, inAdvances in Heterocyclic Chemistry, Ed. A. R. Katritzky, Academic Press, 1994,61, 60.
3. G. N. Nikonov, A. A. Karasik, E. V. Malova, and K. M. Enikeev,Heteroatom. Chem., 1992,3, 439.
4. A. S. Romakhin, F. M. Palyutin, and E. V. Nikitin,Zh. Obshch. Khim., 1996,66, 930, [Russ. J. Gen. Chem., 1996,66 (Engl. Transl.)].
5. A. P. Tomilov, Yu. M. Kargin, and I. N. Chernykh,Elektrokhimiya elementoorganicheskikh soedinenii. Elementy IV, V, VI grupp periodicheskoi sistemy [Electrochemistry of Heteroorganic Compounds. Group IV, V, and VI Elements] Nauka, Moscow, 1986, 94 (in Russian).