S. Ramesh and N. Mat Isa, “THE Investigation of Proximate Analysis of Coal and Coconut Shell – A Review”, rpmme, vol. 3, no. 1, pp. 203–208, Aug. 2022, Accessed: May 02, 2024. [Online]. Available: https://publisher.uthm.edu.my/periodicals/index.php/rpmme/article/view/3768