FILIPE CERQUEIRA QUARESMA, Rui; LUNA HUERTAS, Paula; CARLOS RUIZ DEL CASTILLO, José. Analysis of Electronic Commerce in Portugal: Business Practice or Commercial Fiction?. Journal of Information Systems and Technology Management, [S. l.], v. 3, n. 3, p. p. 291–314, 2007. DOI: 10.4301/s1807-17752006000300003. Disponível em: https://jistem.tecsi.org/index.php/jistem/article/view/10.4301%252FS1807-17752006000300003. Acesso em: 14 mar. 2025.