1. CEMUC, Department of Mechanical Engineering, DEM-FCTUC, University of Coimbra, Coimbra, Portugal
2. Department of Economics, Management and Industrial Engineering, GOVCOPP, University of Aveiro, Aveiro, Portugal
3. Management Science and Engineering, Jinan University, Guangzhou, P.R. China
4. Department of Management Science, Lancaster University Management School, Lancaster University, Lancaster, UK