2003/04 Anuário do / Ministério da Economia
Barriers to competition in the supply of electronic communications networks and services : a discussion paper for interested parties by Ovum and Squire Sanders / Harm Aben ... [et. al.]
Regulating the telecoms market [documento electrónico] : competition and innovation in the broadband economy / Tim Hills, David Cleevely with Ross Pow; ed. Catherine Dyer
Cable TV market scenarios to 2007 [documento electrónico] : prospects for cable TV operators in Germany, the Netherlands and the UK / Jonathan Tee; ed. Rachael Beale