Asmara, Sandi, Winda Rahmawati, Tamrin, and Ipang Setiawan. “Production of Bio Charcoal Briquettes Made from Coal and Palm Fronds”. Open Global Scientific Journal 2, no. 1 (March 31, 2023): 1–14. Accessed July 31, 2025. https://openglobalsci.com/index.php/OGSJ/article/view/13.