de Freitas, Fernanda Beatriz Aires, et al. “Study of Corrosion in Diesel Engine Piston by Soybean Biodiesel and Its Mixtures”. Orbital: The Electronic Journal of Chemistry, vol. 11, no. 5, Oct. 2019, pp. 297-06, https://periodicos.ufms.br/index.php/orbital/article/view/15865.