Romero-Herrera, R., Gallagos-Funes, F., Juarez-Gracia, A. and López-Bonilla, J. (2010) “Tracking Facila Expressions by using Stereoscopy Video and Back Propagation Neural Network”, Kathmandu University Journal of Science, Engineering and Technology, 6(1), pp. 11–24. doi: 10.3126/kuset.v6i1.3303.