Sihotang, F., S. Bahri, and E. Saputra. “Optimasi Bio-Char Hasil Proses Katalitik Pirolisis Palm Kernel Expeller (PKE) Menggunakan Katalis NiMo/NZA Dengan Pendekatan RSM”. Journal of Bioprocess, Chemical and Environmental Engineering Science, Vol. 6, no. 2, Nov. 2025, pp. 110-21, doi:10.31258/jbchees.6.2.110-121.