1. Houben-Weyl, Methoden der Organoschen Chemie, Houben-Weyl, Stuttgart: Georg Thieme Verlag, 1985, p. 941.
2. Barton, D. and Ollis, U.D., Obshchaya organicheskaya khimiya (Comprehensive Organic Chemistry), Moscow: Khimiya, 1983, vol. 4, p. 48.
3. Montalbetti, C.A.G.N. and Falque, V., Tetrahedron, 2004, vol. 61, no. 46, p. 10827.
4. Han S-Y. and Kim, Y.-A., Tetrahedron, 2004, vol. 60, no. 11, p. 2447.
5. Pipko, S.E., Bezgubenko, I.V., Sinitsa, A.D., Rusanov, E.V., Kapustin, E.G., Povolotskii, M.I., and Shvadchak, V.V., Heteroatom Chem., 2008, vol. 19, no. 2, p. 171.