S. K. SRIVASTAVA, V. P. VARSHNEY, U. ., and K. L. SAHNI, “Progesterone profile during estrus cycle in different breeds of cow under tropical climate”, Indian J of Anim Sci, vol. 78, no. 6, Mar. 2011, Accessed: Oct. 23, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAnS/article/view/4754