N. Caetano et al.,  "A data-driven approach to predict hospital length of stay: A Portuguese case study", in Proc. of the 16th Int. Conf. on Enterprise Information Systems (ICEIS 2014), Slimane Hammoudi, Leszek Maciaszek, José Cordeiro, Ed., Lisboa, SCITEPRESS Digital Library, 2014, vol. 1, pp. 407-414