Diniz, F., 		Mendes Neto, F., 		Lima Júnior, F., 		Fontes, L., 		Domingues, T., & 		Figueiredo, L.
(2013).
 A facial expression recognition system for Supporting a Virtual Learning Environment.
In <em>Proceedings of the 9th Brazilian Symposium on Information Systems</em>, (pp. 463-474). Porto Alegre: SBC.
doi:10.5753/sbsi.2013.5712