^Diffie, Bailey W.; Freyre, Gilberto; Putnam, Samuel (November 1946). "The Masters and the Slaves [Casa-Grande & Senzala]: A Study in the Development of Brazilian Civilization". The Hispanic American Historical Review. 26 (4): 497. doi:10.2307/2507653.
^Fontoura, Ary Entre Rios e Janeiros, Coleção Aplauso (Imprensa Oficial, 2006, ISBN85-7060-448-3) p. 240