YAKUBU L. JUMARE; SAMAILA UMARU; MUHAMMAD U. KAISAN; MOHAMMED MOHAMMED. Optimization of Biodiesel Yield from Neem Seed Oil Using Calcined Eggshell Catalyst: Characterization and Performance Analysis. UNIABUJA Journal of Engineering and Technology (UJET), [S. l.], v. 3, n. 1, p. 82–97, 2026. Disponível em: https://ujet.uniabuja.edu.ng/index.php/ujet/article/view/124. Acesso em: 4 feb. 2026.