1. Ch. Sijuter: Chemistry of Organic Compounds of Sulfur, part 3. Inostrannaya Literatura, Moskva, 1973.
2. M. Berman, J. R. van Waser: Synthesis,10, 576 (1972).
3. V. A. Golodov, L. V. Kashnikova: J. Mol. Catal.,19, 113 (1983).
4. V. A. Golodov, Yu. I. Panov: Kinet. Katal.,24, 1276 (1983).
5. E. A. Robinson: Can. J. Chem.,39, 247 (1961).