Reinventing the postal sector in an electronic age / ed. by Michael A. Crew, Paul R. Kleindorfer
Barómetro media e comunicação [documento electrónico] : tendências 2011 / coord. Gustavo Cardoso, Rita Espanha
Wholesale pricing, NGA take-up and competition [documento electrónico] / Steffen Hoernig...[et al.]
EU electronic communications law : competititon and regulation in the european telecommunications market / Paul Nihoul and Peter Rodford