Ediati, Ratna, Maria Ulfa, Hamzah Fansuri, Zainab Ramli, Hadi Nur, and Didik Prasetyoko. 2014. “Influence of TiO2/TS-1 Calcination on Hydroxylation of Phenol”. Journal of Mathematical and Fundamental Sciences 46 (1):76-90. https://doi.org/10.5614/j.math.fund.sci.2014.46.1.7.