Pereira, Marcia Elisa, Aron Ferrreira da Silveira, and Sérgio Oliveira Silveira. 2002. “Microscopic Aspects from Howler monkey’s (Alouatta Fusca Clamitans) Lip”. Brazilian Journal of Veterinary Research and Animal Science 39 (1): 9-12. https://doi.org/10.1590/S1413-95962002000100001.