Paulo Ávila
(1)
, Bebiana Santos
(2)
, Alzira Mota
(3)
, Hélio Castro
(2)
, Luís Pinto Ferreira
(4)
, João Bastos
(1)
, José Carlos Sá
(4)
, Joaquim Moreira
(2)
, António Duarte Santos
(5)
, Gilberto Santos
(6)
(1)
INESC TEC, ISEP, Polytechnic of Porto, Portugal,
(2)
ISEP, Polytechnic of Porto, Portugal,
(3)
NESC TEC, ISEP, Polytechnic of Porto, Portugal,
(4)
LAETA-INEGI, ISEP, Polytechnic of Porto, Portugal,
(5)
Autonomous University of Lisbon and CARS—Centre for Economic Analysis of Social Regulation, Department of Economic and Business Sciences, Portugal,
(6)
Instituto Politécnico Cavado Ave, Portugal