Farianty, Dhika and Putra, Ananda and Latisma DJ, Latisma DJ and Nizar, Umar Kalmar and Sundari, Rita (2019) Biodiesel Production from Palm and Waste Cooking Oils Catalyzed by Silica-Titania Catalyst with Time Variation. International Journal of Innovative Science and Research Technology, 4 (7). pp. 280-284. ISSN 2456-2165