Despesas públicas : bens e serviços: Decreto Lei nº 197/99 de 8 de Junho / José Luís A. Ferreira, Carlos Manuel M. Valente
Mobile ecommerce / Katrina Bond and Danny Williams
Telecoms Hotels, co-location and data centres : hosting the new E-economy / Stephen Young, Dan Gardiner, Sally Walton
International regulatory of utility regulatory institutions / The World Bank Group