Songphon Suekkhachat, Somchai Saeung, and Chayut Nuntadusit. “Application of Microbubble Technique for CO2 and CH4 Entrapment in Biogas”. Journal of Current Science and Technology, vol. 8, no. 2, Feb. 2023, pp. 67-74, https://ph04.tci-thaijo.org/index.php/JCST/article/view/472.