1. Selinger, B., Chemistry in the Marketplace, 4th edn. Harcourt Brace Jovanovich, Sydney, 1989 ; Behnisch, R., Discoveries in Pharmacology, Vol. 3, ed. Parnham, M. J. and Bruinvels, J. Elsevier, New York, 1986, pp. 225–275.
2. Sadler, P. J., Adv. Inorg. Chem., 1991, 36, 1.
3. Fawcett, J., Henderson, W., Kemmitt, R. D. W., Russell, D. R. and Upreti, A., J. Chem. Soc., Dalton Trans., 1996, 1897.
4. Henderson, W. and Sabat, M., Polyhedron, 1997, 16, 1663.