OECD Economic surveys [documento electrónico] : country reviews: Portugal / Organisation for Economic co-Operation and Development
OECD science, technology and industry scoreboard / Organisation for Economic co-Operation and Development
OECD Communications outlook 2003 / Organisation for Economic co-Operation and Development
Les TIC et la croissance económique [documento electrónico] : panorama des industries, des entreprises et des pays de l'OCDE / Organisation de Coopération et de Développement Économiques
ICT and economic growth [documento electrónico] : evidence from OECD countries, industries and firms / Organisation for Economic co-Operation and Development