G. S. JAKHAR, R. SINGH, C. P. MALIK, and R. KUMAR, “Factors affecting productive herd life, longevity and lifetime calf production traits in Hariana cattle”, Indian J of Anim Sci, vol. 80, no. 12, Dec. 2010, Accessed: Oct. 23, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAnS/article/view/2238