1. A. S. Prasad, D. Oberleas, Trace Elements in Human Health and Diseases, Vol. II., Essential and Toxic Elements, Academic Press, New York, 1976, and references therein.
2. E. J. Underwood, Trace Elements in Human and Animal Nutrition, 4th Ed., Academic Press, New York, 1977, and references therein.
3. C. A. McAuliffe, The Chemistry of Mercury, The Macmillan Press Ltd., London, 1977, and references therein.
4. T. Sekine, Y. Hasegawa, Solvent Extraction Chemistry, Marcel Dekker Inc., New York, 1977.
5. S. M. Hasany, I. Hanif,J. Radional. Chem., 47 /1978/ 47.