
1.		Quality of service and network performance / ITU Data Publicação: 2004 Tema: UIT-União Internacional das Telecomunicações
2.		European postal services : 7th annual conference: 8th,9th & 10th March 2004, Hotel Okura, Amsterdam / org. The Institute of Economic Affairs Data Publicação: 2004 Tema: Comunicações Eletrónicas
3.		The next moves : convergence in the communications and content industries / ed. The Economist Intelligence Unit Data Publicação: 2004 Tema: Comunicações Eletrónicas
4.		CEN/TS 14773 [documento electrónico] : postal services: quality of service: measurement of loss and substantial delay in priority and first class single piece mail using a survey of test letters / European Committee for Standardization Data Publicação: 2004 Tema: Normas