Steinmetz S, Souza M. Unusual sexual posture in a howler monkey couple, Alouatta fusca clamitans. Neotrop. Primates [Internet]. 1998 Jun. 1 [cited 2024 Jul. 2];6(2):48-9. Available from: https://primate.socgen.ucla.edu/index.php/multivitaminic/article/view/398