Hendrik, Hardiyanti, et al. “Co-Firing Limbah Biomassa Dan Charcoal Cocopeat Dengan Batubara Pada Industri Fero Nikel”. Innovative: Journal Of Social Science Research, vol. 4, no. 6, Dec. 2024, pp. 5629-43, doi:10.31004/innovative.v4i6.17147.