Kasantikul, Benya. “Improvement Biogas Generating by the Fermenting Barrel for Biogas Production from Organic Waste for Household Use: Doi: 10.14456/Mijet.2022.5”. Engineering Access 8, no. 1 (September 25, 2021): 37–44. Accessed May 7, 2024. https://ph02.tci-thaijo.org/index.php/mijet/article/view/244773.