Izidoro, J., C. Miranda, D. Castanho, C. Rossati, F. Campello, S. Guilhen, D. Fungaro, and S. Wang. “Physical and Chemical Characteristics of Feed Coal and Its By-Products from a Brazilian Thermoelectric Power Plant”. Journal of Applied Materials and Technology, July 2019, pp. 1-14, https://jamt.ejournal.unri.ac.id/index.php/jamt/article/view/1.