1 | CISE, Univ. Beira Interior, Covilhã, 6201-001, Portugal |
2 | Industrial Eng. and Management, Univ. Lusófona, Campo Grande 376, 1749-024, Lisboa, Portugal |
3 | Polytechnic Institute of Coimbra – ISEC, Quinta da Nora, 3030-199 Coimbra, Portugal |
4 | CEMMPRE, Coimbra University, DEM, Polo 2, 3030-290 Coimbra, Portugal |
5 | ISR, Coimbra University, DEEC, Polo 2, 3030-290 Coimbra, Portugal |