Mussen Lamoh M, Jackson Joy E, Rashid M, Islam S, Hashmi S. Biogas Production Optimization from Palm Oil Mill Effluent: Experiments with Anaerobic Reactor . ijie. 2020;12(3):261-270. Accessed July 18, 2024. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/5475