Munir, Gina, and Paul Nealen. “Survey of Captive Hylobatid Diets and Their Association With Gastrointestinal Distress”. Journal of Zoo and Aquarium Research 9, no. 2 (April 30, 2021): 73–80. Accessed May 17, 2021. https://jzar.org/jzar/article/view/511.