Rahman, Mohammed Mahmudur, Moni Akter, Abu Bakar Siddik, Md Waliul Islam, Sadia Afrin, Mirola Afroze, Mala Khan, Md Azizul Hoque, and Md Al Mamun. “Purification of Waste Engine Oil Using Raw Clay, Acid Treated Clay and clay/Activated Charcoal”. Journal of Bangladesh Academy of Sciences 48, no. 1 (June 15, 2024): 121–134. Accessed July 17, 2024. https://banglajol.info/index.php/JBAS/article/view/70241.