Yakubu L. JUMARE, Samaila UMARU, Muhammad U. KAISAN, and Mohammed MOHAMMED. 2026. “Optimization of Biodiesel Yield from Neem Seed Oil Using Calcined Eggshell Catalyst: Characterization and Performance Analysis”. UNIABUJA Journal of Engineering and Technology (UJET) 3 (1):82-97. https://ujet.uniabuja.edu.ng/index.php/ujet/article/view/124.