FIALHO, Joana; GODINHO, Pedro; COSTA, João Paulo; AFONSO, Ricardo; REGALADO, José Gonçalo. A Level-Based Approach to Prioritize Telecommunications R&D. Journal of Telecommunications and Information Technology, Warsaw, Poland, v. 34, n. 4, p. 40–46, 2008. DOI: 10.26636/jtit.2008.4.896. Disponível em: https://jtit.pl/jtit/article/view/896. Acesso em: 15 jun. 2026.