I. Deka, J. Goswami, P. Chakravarty, K. K. Baruah, and B. C. Sarmah, “Synchronization of oestrus with PGF2α analogue and ear implant and serum oestradiol–17ß and progesterone profile in Asom local cows”, Indian J of Anim Sci, vol. 80, no. 2, Jan. 2011, Accessed: Oct. 23, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAnS/article/view/2772