“Synthesis Epoxy Fatty Acid Methyl Ester Using Combined Acid Catalyst”. Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik 24, no. 2 (December 29, 2025): 164–170. Accessed January 1, 2026. https://jurnalteknik.unjani.ac.id/index.php/jt/article/view/742.