João Tasso Sousa (Author) (FEUP); Fernando Lobo Pereira (Author) (FEUP); Alfredo Manuel Martins (Author) (FEUP); Aníbal Castilho Coimbra de Matos (Author) (FEUP); José Miguel Almeida (Author) (FEUP); Nuno Cruz (Author) (FEUP); Sérgio Reis Cunha (Author) (FEUP); E. Pereira da Silva (Author) (FEUP)