Rangganita, F R, Lilis Hermida, A Angraeni, and D Khoirunnisa. 2020. “Reusability Study of Sulfated Zirconia Functionalized SBA-15 Catalyst for Biolubricant Oil Production from Oleic Acid”. Journal of Engineering and Scientific Research 1 (1):44-47. https://doi.org/10.23960/jesr.v1i1.9.