Umar K. A.; Adedo A. A.; Muhammad A.; Sa’eedA.; Muhammad A.; AbdulLateefA.; Gama I. A.; TijaniH. PTIMIZATION AND CHARACTERIZATION OF USED COOKING OIL FOR BIODIESEL PRODUCTION USING RESPONSE SURFACE METHODOLOGY. FUDMA JOURNAL OF SCIENCES, v. 7, n. 6, p. 234 - 240, 30 Dec. 2023.