Telecommunications predictions [documento electrónico] : TMT Trends 2009 / DTT - Deloitte Touche Tohmatsu
World telecommunication standardization assembly proceedings / International Telecommunication Union
TMT predictions Portugal 2009/2010 [documento electrónico] / Deloitte
Anuário da comunicação [documento electrónico] / ed. OberCom
Portugal telecommunications report 2009 [documento electrónico] / Business Monitor International
Yearbook of statistics : telecommunication/ICT Indicators: chronological time series 1999-2008 / International Telecommunication Union
Relatório de regulação 2008 / Autoridade Nacional de Comunicações
Portugal telecommunications report [documento eletrónico] : includes 10-year forecasts to 2029 / Fitch Solutions