1. L.B. Ryland, M.W. Tamele, and J.N. Wilson, in Catalysis (Ed. P.H. Emmett), Reinhold Publ. Co, New York (1960).
2. E.M. Flanigen, Proc. 5th Int. Conf. on Zeolites (Ed. L.V. Rees), Heyden, London (1980).
3. J.H. Gary and G.E. Handwerk, Petroleum Refining: Technology and Economics (Eds. L.F. Albright, R.N. Maddox, and J.J. McKetta), Marcel Dekker, Inc., New York (1975).
4. D.W. Breck, Proc. Conf. on Properties and Application of Zeolites, Soc. Chem. Ind., London (1979).
5. M.L. Occelli and R.M. Tindwa, Clays and Clay Minerals 31, 22 (1983).