1. D. W. Breck, “Zeolite Molecular Sieves-Structure, Chemistry and Use” (John Wiley and Sons, New York, 1974) p. 2.
2. J. L. Guth and H. Kessler, in: J. Weitkamp and L. Puppe (Eds.), “Catalysis and Zeolites: Fundamentals and Applications” (Springer-Verlag, New York, 1999) chap. 1, p. 1.
3. R. Szostak, “Molecular Sieves - Principles of Synthesis and Identification”, 2nd ed. (Blackie Academic and Professional, London, 1998) p. 20.
4. The framework topology of zeolite beta
5. Variation of the Si/Al ratio in nanosized zeolite Beta crystals