Study of networks and services : a vision for the portuguese telecommunications industry in the 21st century / Arthur D. Little
Estudo sobre recursos humanos : visão prospectiva das telecomunicações na primeira década do século XXI / Copina - Sociedade de Consultadoria e Gestão
Impact of telecommunications investment on the portuguese economy / Deloitte & Touche Consulting Group
Utility regulation 1997 : economic regulation of utilities and network industries worldwide / ed. Ilka Lewington