Mardina, P., Wijayanti, H., Tuhuloula, A., Hijriyati, E. and Sarifah 2021. Corncob residue as heterogeneous acid catalyst for green synthesis of biodiesel: A short review. Communications in Science and Technology. 6, 2 (Dec. 2021), 60-68. DOI:https://doi.org/10.21924/cst.6.2.2021.460.