Farikhah, G., Udaibah, W., & Mulyatun, M. (2021). Synthesis and characterization of SO42-/KCC-1 catalyst as an alternative candidate for simultaneous esterification and transesterification reactions. Journal of Natural Sciences and Mathematics Research, 7(1), 1-6. doi:https://doi.org/10.21580/jnsmr.2021.7.1.6797