Deli, Nur Asma, Razita Hariani, and Rahma Sari Nasution. “Synthesis of Methyl Ester Sulfonate from Crude Palm Oil Based on Aluminum Oxide Catalyst”. Journal of Engineering Science and Technology Management (JES-TM) 5, no. 1 (March 30, 2025): 75–80. Accessed January 18, 2026. https://jes-tm.org/index.php/jestm/article/view/237.