Duopoly competition with competitor partial ownership [documento eletrónico] / Duarte Brito, Luís Cabral, Helder Vasconcelos
Compreender + África : fundamentos para competir no mundo / Rui Moreira de Carvalho; Pref. Luís Palha
The global competitiveness report 2010-2011 [documento electrónico] / Xavier Sala-i-Martin