Pandiangan, K. D.; Nisa, K.; Simanjuntak, W.; Alista, D. I.; Noviana, E.; Hasan, S. A. Application of Response Surface Methodology (RSM) to Study Transesterification of Palm Oil in the Presence of Zeolite-A As Catalyst. J. Multidiscip. Appl. Nat. Sci. 2023, 4, 146-157.