1. Department of Management, Instituto de Estudos Superiores de Fafe, CEFAGE-UBI Research Center, University of Beira Interior, Estrada do Sineiro, Covilhã, Portugal
2. CETRAD, University of Trás-os-Montes and Alto Douro UTAD, Vila Real, Portugal
3. Department of Management and Economics, CEFAGE-UBI Research Center, University of Beira Interior, Estrada do Sineiro, Covilhã, Portugal