Pramuang, Surajitr. “Effect of Monoethanolamine Concentrations for CO2 and H2S Elimination in Biogas Improving Process”. Creative Science 12, no. 3 (August 31, 2020): 207–212. Accessed April 26, 2024. https://ph01.tci-thaijo.org/index.php/snru_journal/article/view/239986.