Fatmawati, H., Puspitasari, W., Pujiarti, R., Ardyanti, S., & Fatimah, I. (2018). The Effect of CaO Weight from Snail Shell (Pilla Ampullacea) On Its Activity As Heterogeneous Catalyst on Biodiesel Conversion Of Bran Oil. EKSAKTA: Journal of Sciences and Data Analysis, 18(1), 64–73. https://doi.org/10.20885/eksakta.vol18.iss1.art7