Yakubu L. JUMARE (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), pp. 82–97. Available at: https://ujet.uniabuja.edu.ng/index.php/ujet/article/view/124 (Accessed: 4 February 2026).