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
Telecoms in 2020 [documento electrónico] : regulation / Matthew Howett, Charice Wang, Marcela Perez Sirio