Priatama, A., M. Abdullah, K. Khairurrijal, and H. Mahfudz. “Fabrication of Microporous Water Filter Using Titanium Dioxide Particles, Silica Particles, and Polyethylene Glycol”. Journal of Engineering and Technological Sciences, vol. 42, no. 1, Sept. 2013, pp. 39-52, doi:10.5614/itbj.eng.sci.2010.42.1.3.