Subiakto, A.K.H. et al. 2026. Synthesis and Characterization of SnO and SnO₂ Catalysts for Biodiesel from Crude Palm Oil via Interesterification. Indonesian Journal of Chemical Studies. 5, 1 (Jun. 2026), 54–61. DOI:https://doi.org/10.55749/ijcs.v5i1.98.