van Deursen, Felipe, Escravos: povo marcado, Aventuras na História (in Portuguese), BR: Abril, archived from the original on 12 October 2009, retrieved 7 February 2021.
van Deursen, Felipe, Escravos: povo marcado, Aventuras na História (in Portuguese), BR: Abril, archived from the original on 12 October 2009, retrieved 7 February 2021.