Das contraordenações : breves notas sobre o regime contraordenacional em geral, as contraordenações fiscais e as atinentes à segurança social / David Valente Borges de Pinho
OECD guidelines for the security of information systems and networks : towards a culture of security / Organisation for Economic co-Operation and Development
SIP demystified / Gonzalo Camarillo
Building the e-Service society : e-Commerce, e-Business, and e-Government: IFIP 18th World Computer Congress TC6/TC8/TC11 4th International Conference on E-Commerce, E-Business, E-Government (13E 2004) 22-27 August 2004 Toulouse, France / ed. by Winfried Lamersdorf, Volker Tschammer, Stéphane Amarger