Juárez, Cecilia Paola, Rachel Dvoskin, and Eduardo Fernández-Duque. 2005. “Structure and Composition of Wild Black Howler Troops (Alouatta Caraya) in Gallery Forests of the Argentinean Chaco”. Neotropical Primates 13 (1): 19-22. https://doi.org/10.1896/1413-4705.13.1.19.