Production of Biodiesel Fuel from Used vegetable Oil. Journal of Engineering, [S. l.], v. 17, n. 05, p. 1371–1377, 2011. DOI: 10.31026/j.eng.2011.05.25. Disponível em: https://joe.uobaghdad.edu.iq/index.php/main/article/view/2989. Acesso em: 27 mar. 2025.