1. Mashkina, A.V., Yakovleva, V.N., Sakhaltueva, L.G., and Khairulina, L.N., Neftekhimiya, 2001, vol. 41, no.1, p. 54.
2. Mashkina, A.V. and Khairulina, L.N., Neftekhimiya, 2004, vol. 44, no.1, p. 57.
3. Broadbent, H.S., Slaugh, L.H., and Jarvis, N.L., J. Am. Chem. Soc., 1954, vol. 76, p. 1519.
4. Czechosloval Patent 265614, 1991.
5. Weisser, O. and Landa, S., Sulphide Catalysts: Their Properties and Application, Prague: Czech. Acad. Sci., 1972.