Anderson, Kadie, Michael M Garner, and Patricia M Dennis. “Causes of Mortality in Sloth Bears (Melursus Ursinus) Housed in U.S. Zoos”. Journal of Zoo and Aquarium Research 6, no. 1 (January 31, 2018): 12–15. Accessed May 17, 2021. https://jzar.org/jzar/article/view/261.