Hartanto, D., O. Saputro, W.P. Utomo, A. Rosyidah, D. Sugiarso, T. Ersam, H. Nur, and D. Prasetyoko. 2015. “Synthesis of ZSM-5 Directly from Kaolin Without Organic Template: Part-1: Effect of Crystallization Time”. Asian Journal of Chemistry 28 (1):211-15. https://doi.org/10.14233/ajchem.2016.19348.