Monteleone, Michael. “The Effect of Temperature on Active, Inactive, and Stereotypical Behaviours in Captive Polar Bears (Ursus Maritimus)”. Revue YOUR Review (York Online Undergraduate Research) 8 (August 24, 2021). Accessed July 4, 2022. https://yourreview.journals.yorku.ca/index.php/yourreview/article/view/40572.