1. A. K. Das,A Text Book on Medicinal Aspects of Bio-inorganic Chemistry CBS Publishers and Distributors, Delhi-32, India, Ch. 2, 1990.
2. P. J. Patel, V. K. Patel and P. K. Bhattacharya,Indian J. Chem.,21A, 590 (1982).
3. A. K. Das,Transition Met. Chem. 14, 390 (1989).
4. A. K. Das,Trans. SAEST, (in press).
5. D. Banerjea, T. A. Kaden and H. Sigel,Inorg. Chem.,20, 2586 (1981).