Posada-Duque, John Alexander, and Carlos Ariel Cardona-Alzate. “Validation of Glycerin Refining Obtained As a by-Product of Biodiesel Production”. Ingenieria y Universidad 14, no. 1 (October 27, 2010). Accessed April 24, 2024. https://revistas.javeriana.edu.co/index.php/iyu/article/view/966.