Wattanachai, Piyachat, Benjawan Buasathain, Christian Antonio, and Susan Roces. 2017. “Open Loop Recycling of Recycled Polypropylene for Motorcycle Saddle Application”. ASEAN Journal of Chemical Engineering 17 (2), 60-76. https://dev.journal.ugm.ac.id/v3/AJChE/article/view/8982.