Liberalising telecoms in western Europe / Richard Cranston
Telecommunications : a technology guide / Denis Gross
José Vitorino Damásio : e a telegrafia eléctrica em Portugal / texto de Jorge Fernandes Alves, José Luís Vilela; pref. de Luís Todo-Bom e Ludgero Marques
Creating tomorrow's mobile systems / org. Institute of Electrical and Electronics Engineers