| 1. | Statistics on the information society in Europe / European CommissionData Publicação: 2003 Tema: Comunicações Eletrónicas |  | |
| 2. | Third European Report on Science & Technology indicators : 2003: Towards a knowledge-based economy / European Comission - Directorate General for Research - Knowledge-based economy - Competitiveness, economic analysis and indicatorsData Publicação: 2003 Tema: Comunicações Eletrónicas | | |