1. Dyer, A., and Jamil, M. in “Ion Exchange for Industry” Ed. M. Streat, Ellis Horwood, 1988, Pg. 494.
2. Weiss, A. and Weiss, A., Z. Anorg. Allgem. Chem., 1955 282, 324.
3. Carman, P.C., and Haul, R.A.W., Proc. Roy. Soc. London 1954, A222, 109.
4. Hallaba, E., Ind. J. Chem., 1973 11, 580.
5. Dyer, A. and Malik, S.A., J. Inorg. Nucl. Chem., 1981 43, 2975.