Amin, Sylbialin, Robert Thomas Bachmann, and Soon Kong Yong. “Oxidised Biochar from Palm Kernel Shell for Eco-Friendly Pollution Management”. Scientific Research Journal 17, no. 2 (August 28, 2020): 44–60. Accessed November 5, 2024. https://journal.uitm.edu.my/ojs/index.php/SRJ/article/view/2954.