The European Union's telecommunications policy / European Commission. Directorate-General XIII - Telecommunications, information market and exploitation of research
9th CEPT Radio Conference : 11-13 October 2000: Lisbon / European Conference of Postal and Telecommunications Administrations
Wireless Communication : the interactive multi-media CD-ROM / editor-in-chief Jean Paul Linnartz
O País em números : informação estatística 1991-2001: CD ROM / Instituto Nacional de Estatística