Leal, S. A. Z.; Defler, T. R. Sympatric Distribution of Two Species of Alouatta (A. Seniculus and A. Palliata: Primates) in Chocó, Colombian Amazonas, Peru. Neotrop. Primates 2013, 20 (1), 1-11. https://doi.org/10.1896/044.020.0102.