Rayan, G.N., A. Galal, M.M. Fathi, and A.H. El-Attar. “Impact of Layer Breeder Flock Age and Strain on Mechanical and Ultrastructural Properties of Eggshell in Chicken”. International Journal of Poultry Science 9, no. 2 (January 15, 2010): 139–147. Accessed September 22, 2025. https://ijpsjournal.org/index.php/ijps/article/view/1365.