Thovicha, M., and V. Pavarajarn. “Fabrication of Mesoporous Titanium Dioxide Assisted by Resorcinol/Formaldehyde Gel”. ASEAN Journal of Chemical Engineering, Vol. 11, no. 1, Dec. 2011, pp. 28-34, https://jurnal.ugm.ac.id/v3/AJChE/article/view/8083.