1. Norobu, M., Dickstein, J.L., and Miller, S.J., J. Chem. Soc., Perkin Trans. 1, 1979, no. 9, p. 2103.
2. Schweiser, E.E. and De Voc Coff, S., J. Org. Chem., 1978, vol. 43, no. 15, p. 2972.
3. Hoffmann, H. and Foerster, H., Tetrahedron Lett., 1964, nos. 17–18, p. 983.
4. Shutt, J.R. and Trippett, S., J. Chem. Soc. C, 1969, no. 15, p. 2038.
5. Khachatryan, R.A., Zalinyan, S.A., Bagdasaryan, G.B., Sarkisova, E.A., and Indzhikyan, M.G., Izv. Ross. Akad. Nauk, Ser. Khim., 2002, no. 1, p. 139.