Prasetyoko, D., Ayunanda, N., Fansuri, H., Hartanto, D. and Ramli, Z. (2014) “Phase Transformation of Rice Husk Ash in the Synthesis of ZSM-5 without Organic Template”, Journal of Mathematical and Fundamental Sciences, 44(3), pp. 250-262. doi: 10.5614/itbj.sci.2012.44.3.5.