Azrin Camillius Tan, Nadia Dayana Bahar, Wira Jazair Yahya, and Ahmad Muhsin Ithnin. 2017. “The Effect of Microbubbles on the Reduction of Biochemical Oxygen Demand (BOD) of Palm Oil Mill Effluent (POME)”. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 32 (1):9-14. https://semarakilmu.com.my/journals/index.php/fluid_mechanics_thermal_sciences/article/view/2615.