1. R.M. Barreer, Proc. 5th Int. Zeolite Conf., naples, Italy, June 2–6, 1980 (L. V. C. Ress, Ed.), Heyden, London, 1980, pp. 273–290
2. “Introduction to Zeolite Science and Practice”;Townsend,1991
3. Chapter 10 Ion Exchange in Zeolites
4. “Salt Occlusion in Zeolite Crystals”;Rabo,1976
5. A. Cledeld, C. H. Saldarriaga and R. C. Buckley, Proc. 3rd Int. Cod. Molecular Sieves; Recent Progress Reports; Zürich, Switzerland, Sept. 7–13, 1973 (J. B. Uytterhoeven, Ed.) University of Leuven Press, Leuven, Belgium, 1973; paper No 130, pp. 241–245