Mohammad, Nur Qurratu'ain, and Nor Hazren Abdul Hamid. “Palm Kernel Shell As Potential Adsorbent for Treatment and Decolorization of Palm Oil Mill Effluent (POME)”. Progress in Engineering Application and Technology, vol. 5, no. 1, June 2024, pp. 557-62, https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/14715.