A. C. Rama, O. Isabel, C. M. Silva, F. Fernandez-Llimos, I. V. Figueiredo, and M. M. Caramona, “Development of a multidimensional system for classification and management of health information: applying to clinical information”., Acta Med Port, vol. 20, no. 6, pp. 567–74, Feb. 2008.