Wallace, Alfred Russel. “The Malay Archipelago. The Land of the Orang-Utan and the Bird of Paradise. A Narrative of Travel With Studies of Man and Nature”. Revista De Antropologia, vol. 12, nº 1-2, dezembro de 1964, p. 138-, https://doi.org/10.11606/2179-0892.ra.1964.110768.