1. OECD (2003) “ICT and Economic Growth Evidence from OECD countries, industries and firms”, Paris.
2. Van Ark B, Inklaar R. (2005) “Catching Up or Getting Stuck? Europe's Troubles to Exploit ICT's 2005 Productivity Potential”. Research Memorandum GD-79.
3. The Death of Distance: How the Communications Revolution Is Changing our Lives;Cairncross,2001
4. Economic geography and international inequality;Redding;Journal of International Economics,2004
5. ICT Diffusion in Developing Countries. Towards a New Concept of Technological Takeoff;Lechman,2005