1. R.T. Smith and M.C. Baird, Inorg. Chim. Acta 62 (1982) 135.
2. F. Joó and Z. Tóth, J. Mol. Catal. 8 (1990) 369.
3. R.S. Bauer, H. Chung, P.W. Glockner and W. Keim, US Pat. 3,644,563 (19720.
4. L.H. Pignolet, ed.,Homogeneous Catalysis with Metal Phosphine Complexes (Plenum Press, New York, 1983).
5. A. Jegorov, J. Podlaha and M. Polievka, Czech Pat. 246734 (1988).