M. SINGH, N. S. SIDHU, and G. S. BISHT, “Direct and correlated response to selection for productive and reproductive traits in Sahiwal cows”, Indian J of Anim Sci, vol. 70, no. 3, Dec. 2013, Accessed: Oct. 23, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAnS/article/view/35677