1. See for example: M.G. Choi, H.C. Brown, Inorg. Chim. Acta. 198 (1992) 823, and references therein.
2. See for example: A.J. Poe, Inorg. Organomet. React. 221 (1991) 7 and references therein.
3. (a) D. Astruc, Electron Transfer and Radical Processes in Transition Metal Chemistry, VCH, New York, 1995.
4. (b) M. Chanon, M. Julliard, J.C. Poite (Eds.), Paramagnetic Organometallic Species in Activation /Selectivity, Catalysis, vol. 257, NATO ASI Series C, Kluwer, Dordrecht, 1989.
5. Encylcopedia of Inorganic Chemistry;Kiss,1993