Ramona Safitri, T. W. Samadhi, and W. Wulandari. “Thermochemical Study of Combustion Behavior and Ash of Hybrid Coal”. ITB Graduate School Conference, vol. 5, no. 1, Oct. 2025, https://gcs.itb.ac.id/proceeding-igsc/index.php/igsc/article/view/747.