Sugai N., Shipley C., Ellerbrock R., and Stewart J. “Testicular Size As an Indicator of Poor Sperm Output in White-Tailed (Odocoileus Virginianus) and Mule (Odocoileus Hemionus) Deer Bucks”. Clinical Theriogenology, vol. 10, no. 3, Sept. 2018, p. 358, doi:10.58292/ct.v10.10066.