Psycharis, V., V. Perdikatsis, and G. Christidis. 2004. “CRYSTAL STRUCTURE AND RIETVELD REFINEMENT OF ZEOLITE A SYNTHESIZED FROM FINE-GRAINED PERLITE WASTE MATERIALS”. Bulletin of the Geological Society of Greece 36 (1):121-29. https://doi.org/10.12681/bgsg.16591.