Mukhlis, Tengku, Idral Amri, and Zuchra Helwani. “Upgrading Karakteristik Biopelet Tandan Kosong Sawit Dengan Penambahan Oil Sludge Sebagai Co-Firing”. Journal of Bioprocess, Chemical and Environmental Engineering Science 2, no. 1 (March 31, 2021): 45-55. Accessed February 9, 2026. https://jbchees.ejournal.unri.ac.id/index.php/jbchees/article/view/33.