Hybrid CaO/ZnFe2O4 Modified with Al2O3 as a Green Catalyst for Biodiesel Production from Waste Cooking Oil. Jurnal Kimia Valensi, [S. l.], v. 10, n. 1, p. 1–10, 2024. DOI: 10.15408/jkv.v10i1.36594. Disponível em: https://journal.uinjkt.ac.id/valensi/article/view/36594. Acesso em: 27 oct. 2025.