Dias, J., 		Traore, I., 		Ferreira, V., 		Ardigo, J., & 		De Rolt, C.
(2015).
 Exploratory Use of PPG Signal in Continuous Authentication.
In <em>Proceedings of the 15th Brazilian Symposium on Information and Computational Systems Security</em>, (pp. 142-155). Porto Alegre: SBC.
doi:10.5753/sbseg.2015.20091