Zirconium Sulfate as Catalyst for Biodiesel Production by Using Reactive Distillation. Journal of Engineering, [S. l.], v. 22, n. 1, p. 68–82, 2016. DOI: 10.31026/j.eng.2016.01.05. Disponível em: https://joe.uobaghdad.edu.iq/index.php/main/article/view/272.. Acesso em: 2 may. 2024.