^Seibert, Gerhard (2005). Comrades, Clients and Cousins: Colonialism, Socialism and Democratization in Sao Tome and Principe. Boston: Brill. pp. 71–72.
^Lloyd-Jones, Stewart (2003). The Last Empire: Thirty Years of Portuguese Decolonization. Intellect. pp. 38–39.
^Valor simbólico do centro histórico da Praia, Lourenço Conceição Gomes, Universidade Portucalense, 2008, p. 136