Izida, T., L. Bussler, L. H. da C. Andrade, and S. M. Lima. “Monitoring the Transesterification Reaction of Vegetable Oil to Biodiesel by Fluorescence Spectroscopy With UV Excitation: Correlation With Viscosity”. Orbital: The Electronic Journal of Chemistry, Vol. 10, no. 1, Jan. 2018, pp. 22-25, https://periodicos.ufms.br/index.php/orbital/article/view/16378.