International roaming [documento electrónico] : ERG benchmark data report for April 2008 to September 2008 / European Regulators Group
Portugal (Country regulation overview) [documento electronico] / Marcela Perez Sirio
The status of mobile termination regulation in Europe in 2009 [documento electrónico] / Matthew Howett, Charice Wang, Marcela Perez Sirio
OECD Communications outlook 2009 [documento electrónico] / Organisation for Economic co-Operation and Development
Telecoms in 2020 [documento electrónico] : regulation / Matthew Howett, Charice Wang, Marcela Perez Sirio
The international communications market 2009 [documento electrónico] / Office of Communications
Relatório de regulação 2008 [documento electrónico] / Entidade Reguladora para a Comunicação Social
Relatório de regulação 2009 [documento electrónico] / Entidade Reguladora para a Comunicação Social
Portugal telecommunications report [documento eletrónico] : includes 10-year forecasts to 2029 / Fitch Solutions