Olá Europa : guia da Europa e da União Europeia para jovens / Serviço das Publicações Oficiais das Comunidades Europeias
The European Union's telecommunications policy / European Commission. Directorate-General XIII - Telecommunications, information market and exploitation of research
Eurostat yearbook 2002 : the statistical guide to Europe / European Commission
Wireless Communication : the interactive multi-media CD-ROM / editor-in-chief Jean Paul Linnartz