Morais, Rosana Nogueira de, Raul Gastão Mucciolo, and Wilson Gonçalves Viana. “Reproductive Biology of Donkey. I. Testicular Measurement and Sexual Behaviour at Semen Collection”. Brazilian Journal of Veterinary Research and Animal Science 30, no. 1 (June 1, 1993): 47-50. Accessed November 29, 2022. https://www.revistas.usp.br/bjvras/article/view/52018.