Thanh H. Trinh et al. 2025. BIODIESEL SYNTHESIS FROM WASTE COOKING OIL USING CATALYST DERIVED FROM SEA CRAB SHELL AND NICKEL OXIDE. HUIT Journal of Science. 25, 6 (Dec. 2025), 3–12. DOI:https://doi.org/10.62985/j.huit_ojs.vol25.no6.356.