1. Timokhina, L.V., Usov, V.A., Voronkov, M.G., Kozyreva, O.B., Panova, G.M., and Yashchenko, M.P., Russ. J. Org. Chem., 1996, vol. 32, p. 1821.
2. Usov, V.A., Timokhina, L.V., and Voronkov, M.G., Usp. Khim., 1990, vol. 59, p. 649; Usov, V.A., Timokhina, L.V., and Voronkov, M.G., Sulfur Rep., 1992, vol. 12, no. 2, p. 95.
3. Shagun, V.A., Timokhina, L.V., and Panova, G.M., Izv. Ross. Akad. Nauk, Ser. Khim., 1997, p. 1273.
4. Clesse, F. and Quiniou, H., C.R. Acad. Sci., Ser. C, 1971, vol. 272, p. 326.
5. Rasmussen, J.B., Shabana, R., and Lawesson, S.-O., Tetrahedron, 1981, vol. 37, p. 197.