1. J. S. Rhee and P. K. Dasgupta, Mikrochim. Acta1985 III, 49.
2. P. K. Dasgupta and E. L. Loree, Anal. Chem.58, 507 (1986).
3. J. Ruzicka and E. H. Hansen, Anal. Chim. Acta145, 1 (1983).
4. K. K. Stewart, Abstract No. 418, 36th Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy, New Orleans, U. S. A. February, 1985.
5. I. M. Kolthoff, E. B. Sandell, E. J. Meehan, and S. Bruckenstein, Quantitative Chemical Analysis, 4th Ed., London: MacMillan 1969.