1. A. Acrivos, Ind. Eng. Chemistry, 48, 703–710 (1956).
2. S. B. Applebaum, Demineralization by Ion Exchange, Academic Press, New York and London, 1968.
3. S. Cherney, M.S. thesis in Chemical Engineering, University of California, Berkeley, 1966.
4. J. A. Dodds and D. Tondeur, Chem. Eng. Science, 27, 1267–1281, 1972A.
5. J. A. Dodds and D. Tondeur, Chem. Eng. Science, 27, 1291–1298, 1972B.