Treading the path to the knowledge society : patterns of ICT diffusion in Portugal / Observatory for Innovation and Knowledge, Innovation and Knowledge Society Unit - Presidency of the Council of Ministers; coord. João Trocato da Mata e Nuno Moreira
The Communications market 2004 [documento electrónico] / Office of Communications
The communications market 2006 [documento electrónico] / Office of Communications
ICT and economic growth [documento electrónico] : evidence from OECD countries, industries and firms / Organisation for Economic co-Operation and Development