1. Jones, M. M. “Elementary Coordination Chemistry”, Prentice-Hall Inc., Englewood diffe, N. J., Chapter (1964).
2. D. Bhatta et al.: Journal of Indian chemical society 73, 616 (1996).
3. Dwyer, F. P., and Mellor, D. P., “Chelating Agent and metal chelates”, Academic Press, Inc., New York, Chapter-1 (1964).
4. M. Patra and B. Dash: Journal of Indian chemical society 55,587(1978).
5. D. Bhatta et al., Ibid: Journal of Indian chemical society 81, 261 (2000).