Arifin, M.A. et al. 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 (Mar. 2017), 59–64.