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3. P. C. HUANG, A. MIZANY, J. L. PAULEY, J. Phys. Chem., 68 (1964) 2575.
4. See for example: A. DYER, H. ENAMY, Zeolites, 4 (1984) 319; D. DRUMMOND, A. DE JONG, L. V. C. REES, J. Phys. Chem., 87 (1983) 1967.
5. W. M. MEIER, D. H. OLSEN, Atlas of Zeolite Structure Types, Special issue, Zeolites, 12 (1992) 449.