Zailan Z, Ali H, Chau JW, Jusoh M, Tahir M, Zakaria ZY. Development of Sulphonated Sago Pith Waste Catalyst for Esterification of Palm Fatty Acid Distillate to Methyl Ester. Chemical Engineering Transactions [Internet]. 1Feb.2020 [cited 18Jul.2024];78:31-6. Available from: https://www.cetjournal.it/index.php/cet/article/view/CET2078006