Nonis, F.; Ulrich, L.; Dozio, N.; Antonaci, F. G.; Vezzetti, E.; Ferrise, F.; Marcolin, ... (2021) Building an ecologically valid facial expression database – Behind the scenes. In: 15th International Conference on Universal Access in Human-Computer Interaction, UAHCI 2021, held as part of the 23rd International Conference, HCI International 2021, pp. 599-616. ISBN: 978-3-030-78091-3 Contributo in Atti di Convegno (Proceeding)