Serviços de telecomunicações Portugal vs Europa [documento electrónico] : análise e previsões, 2005-2010 / Gabriel Coimbra
Mercado empresarial de tecnologias da informação [documento electrónico] : sondagem e previsões, 2005-2010 / Orlando Bandeira de Almeida e Gabriel Coimbra
Worldwide telecom spending 2007-2011 forecast [documento electrónico] : worldwide telecom black book, 2007 / Stephen Minton
OECD Communications outlook 2007 / Organisation for Economic co-Operation and Development
The little data book on information and communication technology 2007 / ed. World Bank
Lithuanian communications sector 2006 / Communications Regulatory Authority
Mobile 2007 / ed. Institut de l'Audiovisuelle et des Télécommunications en Europe