Santos, E.P. da S., de Souza, E.F., Ramos, T.C.P.M., da Silva, M.S. and Fiorucci, A.R. 2018. Evaluation of Potentiometric Methods for Acid Number Determination in Commercial Biodiesel Samples and Proposal of Alternative Method. Orbital: The Electronic Journal of Chemistry. 10, 1 (Jan. 2018), 47-53.