A. Júdice et al.,  "Elderly speech collection for speech recognition based on crowd sourcing", in Proc. of the 3rd Int. Conf. on Software Development for Enhancing Accessibility and Fighting Info-Exclusion (DSAI 2010), Gnanayutham, P., Paredes, H., and Rekanos, I. T., Ed., Oxford, UTAD - Universidade de Trás-os-Montes e Alto Douro, 2010, pp. 103-110