Md Zain, Badrul Aisham, Fatin Farhana Anuar, and Saad Abdullah Khan. 2020. “The Improvement of Flexible Aerator Parameter to Increase Dissolved Oxygen Level in Freshwater”. International Journal of Integrated Engineering 12 (3): 197-206. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/5359.