Junpadit, P., A. . Rerngnarong, and P. Boonsawang. “Potential of Biogas Production from Palm Empty Fruit Bunches and Its Utilization”. Recent Science and Technology, vol. 14, no. 3, Dec. 2022, pp. 608-21, https://li01.tci-thaijo.org/index.php/rmutsvrj/article/view/249199.