M. S. Khatkar, J. S. Sandhu, G. S. Brah, and M. L. Chaudhary, “Efficiency of sampling procedures for genetic improvement of shell quality by specific gravity in layer chickens”, Indian J of Anim Sci, vol. 68, no. 6, Jul. 2012, Accessed: Oct. 24, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAnS/article/view/20932