Arifin, Danang Nor, and Hidawati Hidawati. “Utilization of BCFS (Biomass Coal Fuel-Sludge) As Substitution of Energy Sources in Industrial Boilers”. Procedia of Engineering and Life Science 40 (July 7, 2023). Accessed July 23, 2024. https://pels.umsida.ac.id/index.php/PELS/article/view/1382.