Abubakar, Usman, and Jiya Mohammed. 2026. “Coconut-Shell Activated Carbon-Supported CaO for Biodiesel Production from Waste Cooking Oil: Catalyst Preparation and Process-Parameter Screening”. FUDMA Journal of Sciences 10 (22): 232-36. https://doi.org/10.33003/fjs-2026-1022-6227.