Arifin, Mohd Azmir, Maizirwan Mel, Nurhusna Samsudin, Yumi Zuhanis Has-Yun Hashim, Hamzah Mohd. Salleh, and Iis Sopyan. 2017. “Different Oxidation Treatments on Polystyrene (PS) Microspheres by Using an Ultraviolet/Ozone (UVO3) System: Different Oxidation Treatments on Polystyrene (PS)”. Proceedings of the Pakistan Academy of Sciences: B. Life and Environmental Sciences 54 (1):59-64. http://ppaspk.org/index.php/PPAS-B/article/view/372.