Prapaipis Tawonsri, Somchai Saeung, and Chayut Nuntadusit. “Application of microbubbles for cleaning coal powder”. Journal of Current Science and Technology 8, no. 2 (February 18, 2023): 57–65. accessed March 15, 2025. https://ph04.tci-thaijo.org/index.php/JCST/article/view/471.