ZOHERA, Z.; HELWANI, Z.; SUNARNO, S. Optimizing Palm Oil Biodiesel Purity for a Cleaner Environment: Urea Complexation and RSM Approach. Leuser Journal of Environmental Studies, [S. l.], v. 3, n. 2, p. 67–78, 2025. DOI: 10.60084/ljes.v3i2.311. Disponível em: https://heca-analitika.com/ljes/article/view/311. Acesso em: 10 nov. 2025.