[7] Georgiev D., Bogdanov B., Angelova K., Markovska I., Hristov Y., Synthetic zeolites — structure, classification, current trends in zeolite synthesis. Review, International Science Conference, 4–5.06.2009, Stara Zagora, Bulgaria.
[23] Christidis G.E., Galani K., Markopoulos T., Synthesis of high added value zeolites from perlite and expanded perlite waste materials, in: Scott P.W., Bristow C.M. (Eds.), Industrial Minerals and Extractive Industry Geology, The Geological Society Publishing House, UK 2002, p. 345.
[24] Psycharis V., Perdikatsis V., Christidis G., Crystal structure and Rietveld refinement of zeolite A synthesized from fine-grained perlite waste materials, Bulletin of the Geological Society of Greece 36 — Proceedings of the 10th International Congress, Thessaloniki, April 2004, p. 121. 10.12681/bgsg.16591
[35] Dwyer J., Millward D., O’MALLEY P.J., Araya A., Corma A., Fornes V., Martinez A., J. Chem. Soc., Faraday Trans., 86/6 (1990), 1001. http://dx.doi.org/10.1039/ft990860100110.1039/ft9908601001
[41] Wilson S.T., Templating in molecular sieve synthesis, in: Robson H. (ed.), Verified syntheses of zeolitic materials, Elsevier, Amsterdam — London — New York — Oxford — Paris — Shannon — Tokyo, 2001, p. 27. http://dx.doi.org/10.1016/B978-044450703-7/50102-210.1016/B978-044450703-7/50102-2