Informe anual 2011 [documento electrónico] / Comisión del Mercado da las Telecomunicaciones
Annual report 2011 [documento eletrónico] / National Authority for Management and Regulation in Communications of Romania
New revenue opportunities in telecoms [documento eletrónico] : 2013–16 / John Lively
Portugal (country regulation overview) [documento eletrónico] / Sravan Kumar Koka
Mobile money interoperability: outlook and Implications [documento eletrónico] : international developments will drive domestic interoperability / Angel Dobardziev