PTIMIZATION AND CHARACTERIZATION OF USED COOKING OIL FOR BIODIESEL PRODUCTION USING RESPONSE SURFACE METHODOLOGY. FUDMA JOURNAL OF SCIENCES, [S. l.], v. 7, n. 6, p. 234–240, 2023. DOI: 10.33003/fjs-2023-0706-2081. Disponível em: http://www.fjsadmin.fudutsinma.edu.ng/index.php/fjs/article/view/2081. Acesso em: 12 sep. 2025.