1. Ivonin, S.P., Vest. Dnepropetrovsk. Uuniv., Ser. Khimiya, 2000, no. 4, p. 52.
2. Ivonin, S.P., Vest. Dnepropetrovsk. Uuniv., Ser. Khimiya, 2001, no. 6, p. 69.
3. Ivonin, S.P., Vest. Dnepropetrovsk. Uuniv., Ser. Khimiya, 2001, 6, p. 71.
4. Cashion, P., Porter, K., Cadger, T., Sathe, G., Tranquilla, T., Notman, H., and Jay, E., Tetrahedron Lett., 1976, vol. 42, p. 3769.
5. Beattie, T.R. and Webster, M., J. Chem. Soc., 1961, p. 1730.