1. A. K. De andN. D. Chowdhury, Chromatographia11, 586 (1978).
2. K. A. Kraus, T. A. Carlson andJ. S. Johnson, Nature177, 1128 (1956).
3. K. A. Kraus, H. O. Phillips, T. A. Carlson andJ. S. Johnson, Proc. 2nd Int. Conf. Peaceful Uses of Energy, Geneva, 1957.
4. J. Van, R. Smit, J. J. Jacobs andW. Robb, J. Inorg. Nucl. Chem.12, 104 (1959).
5. L. Erdey, International Series of Monographs on Analytical Chemistry, “Gravimetric Analysis”, 1st ed. Pergamon Press, New York, 1965.