Portugal telecommunications report [documento eletrónico] : includes 10-year forecasts to 2029 / Fitch Solutions
Portugal telecommunications report 2009 [documento electrónico] / Business Monitor International
Anuário da comunicação [documento electrónico] / ed. OberCom
TMT predictions Portugal 2009/2010 [documento electrónico] / Deloitte
World telecommunication standardization assembly proceedings / International Telecommunication Union
Telecommunications predictions [documento electrónico] : TMT Trends 2009 / DTT - Deloitte Touche Tohmatsu