Mussen Lamoh, M., Jackson Joy, E., Rashid, M., Islam, S. and Hashmi, S. (2020) “Biogas Production Optimization from Palm Oil Mill Effluent: Experiments with Anaerobic Reactor ”, International Journal of Integrated Engineering, 12(3), pp. 261-270. Available at: https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/5475 (Accessed: 5March2021).