1. Instituto Superior Miguel Torga, Coimbra, Portugal & NECE-UBI - Research Unit in Business Sciences, University of Beira Interior, Covilhã, Portuga
2. Research on Economics, Management and Information Technologies, REMIT, Portucalense University, Porto, Portugal
3. ProMetheus–Instituto Politécnico de Viana do Castelo, Viana do Castelo, Portugal