kandiel, Mohamed M.M., and Anwar A. El Shafey. “Ultrasonographic Appearance and Echo-Pattern Characterization of Donkeys’ Internal Reproductive Organs”. Journal of Advanced Veterinary Research 7, no. 2 (April 1, 2017): 39-46. Accessed January 21, 2025. https://advetresearch.com/index.php/AVR/article/view/58.