Jorge Bacelar Gouveia (September–December 2017). “The Constitutionalism of Angola and its 2010 Constitution”. Revista de Estudos Constitucionais, Hermenêutica e Teoria do Direito (RECHTD) 9(3). pp. 221–239. 28 October 2020閲覧。 (ポルトガル語)
Dismantling the Portuguese Empire, Time Magazine (Monday, 7 July 1975) NB: The figures in this source are too high, as the total number of whites in the colonies did not reach 700,000.