Yelmiza, Y., R. Joni, M. Rokim, H. Yuvendius, E. Zondra, and A. Arlenny. “The Effect of Activated Carbon From Palm Oil Kernel Shells on Waste Cooking Oil for Soap Production”. MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering, Vol. 8, no. 1, Feb. 2026, pp. 1-12, doi:10.46574/motivection.v8i1.527.