Abubakar, Usman, and Jiya Mohammed. “Coconut-Shell Activated Carbon-Supported CaO for Biodiesel Production from Waste Cooking Oil: Catalyst Preparation and Process-Parameter Screening”. FUDMA Journal of Sciences 10, no. 22 (October 27, 2026): 232–236. Accessed October 28, 2026. https://fjs.fudutsinma.org.ng/index.php/fjs/article/view/6227.