1. D.R. Lide (Ed.), Handbook of Chemistry and Physics, 76th ed., CRC Press, Boca Raton, FL, 1995, pp. 12–14
2. D.W. Breck, Zeolite Molecular Sieves, Wiley, New York, 1974
3. A. Cremers, in: Proceedings of the Fourth International Zeolite Conference, American Chemical Society, Washington, DC, 1977, p. 179
4. R.M. Barrer, in: Proceedings of the Fifth International Zeolite Conference, Heyden, London, 1982, p. 273
5. H.S. Sherry, in: Supplementary Textbook for the Eleventh International Zeolite Association Summer School, Taejon, Korea, 1996, unpublished