Madkour, F., S. A. . Mohamed, K. E. H. Abdalla, and Y. A. Ahmed. “Post-Hatching Development of Ventriculus in Muscovy Duck: Light and Electron Microscopic Study”. Journal of Advanced Veterinary Research, vol. 12, no. 1, Jan. 2022, pp. 42-53, https://advetresearch.com/index.php/AVR/article/view/843.