Nakpong, P., and S. Wootthikanokkhan. “MIXTURES OF VEGETABLE OIL AND USED FRYING OIL AS FEEDSTOCK FOR BIODIESEL PRODUCTION IN THAILAND”. Suranaree Journal of Science and Technology, vol. 17, no. 2, Aug. 2026, pp. 193-02, https://ph04.tci-thaijo.org/index.php/SUJST/article/view/13604.