Hashim, N., M. Abd Ghani, M. F. Emran, and M. B. Besar. “Synthesizing the Biochar from Gelam Tree Leaves by Pyrolysis Method”. International Journal of Synergy in Engineering and Technology, Vol. 3, no. 2, Dec. 2022, pp. 143-9, https://ijset.tatiuc.edu.my/index.php/ijset/article/view/134.