Fadhly, Ahmad, Jevie Carter Putra, Rudy Anarta, and Trisna Prima Sari S. “Classification of Coal Quality Based on Proximate Analysis at CV. Bara Mitra Kencana to Meet the Requirements of Ombilin Power Plant”. Journal of Innovative and Creativity (Joecy) 5, no. 1 (September 21, 2025): 25830–25836. Accessed October 12, 2026. https://joecy.org/index.php/joecy/article/view/3908.