Yusoff, Harunsyah, Nik Meriam Sulaiman, and Mohd Kheireddine Aroua. “Ultra Filtration Using Gas Sparging Technique for Treatment of Natural Rubber Effluent”. Malaysian Journal of Science 23 (December 30, 2004): 177–184. Accessed December 24, 2024. http://adum.um.edu.my/index.php/MJS/article/view/9052.