1. R.J. Collin, J. Jones, W.P. Griffith, J. Chem. Soc. Dalton Trans. (1974) 1094.
2. J.A. Ragazzo, E.J. Behrman, Bioinorg. Chem. 5 (1976) 343.
3. J.S. Deetz, E.J. Behrman, J. Org. Chem. 45 (1980) 135.
4. F.A. Cotton, G. Wilkinson, Advanced Inorganic Chemistry, 5th ed., John Wiley & Sons, New York, 1988.
5. M. Schröder, Chem. Rev. 80 (1980) 187.