Chaichana E, Saowapark T, Sukrat K, Khanthong C, Pathomnithipinyo T, Jaturapiree A. Biodiesel Production from Used Oils with Char Based Catalyst from Pomelo Peel Impregnated with KOH as a Catalyst . J. Adv. Dev. Eng. Sci. [internet]. 2024 Apr. 30 [cited 2025 Dec. 8];14(39):31-45. available from: https://ph03.tci-thaijo.org/index.php/pitjournal/article/view/723