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2. E.M. Flanigen, R.L. Patton and S.T. Wilson, in:Innovation in Zeolite Materials Science, eds. P.J. Grobet, W.J. Mortier, E.F. Vansant and G. Schulz-Ekloff, Studies in Surface Science and Catalysis 37 (Elsevier, Amsterdam, Oxford, New York, Tokyo, 1988) p. 13.
3. E.G. Derouane, E.W. Valyocsik and R. von Ballmoos, US Pat. 4.623.572, assigned to Mobil Oil Corp. (1986).
4. D. Goldfarb, Zeolites 9 (1989) 509.
5. S.T. Wilson and E.M. Flanigen, Us Pat. 4.567.029, assigned to Union Carbide Corp. (1986).