Penedo, J., Diniz, M., Ferreira, S., Silveira, D., & Capra, E. (2012). Markov Models Applied to the Usability Evaluation of a Distance Education System. In Proceedings of the 8th Brazilian Symposium on Information Systems, (pp. 13-24). Porto Alegre: SBC. doi:10.5753/sbsi.2012.14390