Santos, M. N., E. F. de Souza, T. C. P. M. Ramos, A. A. Cavalheiro, A. R. Fiorucci, and M. S. da Silva. “Effect of Curcumin Natural Antioxidant on Oxidative Stability of Commercial Biodiesels from Different Raw Materials”. Orbital: The Electronic Journal of Chemistry, Vol. 11, no. 4, Sept. 2019, pp. 239-45, https://periodicos.ufms.br/index.php/orbital/article/view/15913.