David Cabaço, University of Évora, Évora, Portugal
Margarida Saraiva, University of Évora and BRU-UNIDE/ISCTE-IUL, Évora, Portugal
José Correia, University of Évora, Évora, Portugal
Jorge Casas Novas, University of Évora and CEFAGE-UE, Évora, Portugal