1. (a) P. Braunstein (1991). Platinum Metals Rev. 35(1), 10.
2. (b) P. Braunstein and J. Rose’, in I. Bernal (ed.), Stereochemistry of Organometallic and Inorganic Compounds (Elsevier, Amsterdam, 1989), Vol. 3.
3. (c) J. M. Thomas, S. E. Moro, and J. P. Desvergne (1977). Adv. Phys. Org. Chem. 15, 63.
4. (d) D. F. Shriver, H. D. Kaesz, and R. D. Adams (eds.), The Chemistry of Metal Cluster Complexes (VCH, New York, 1990)
5. (a) D. Campagnola, M. Castiglioni, W. Dastru’, S. Deabate, R. Giordano, P. J. King, and E. Sappa (1997). Inorg. Chim. Acta 262, 157.