M. BHUYAN, B. C. DEKA, B. C. SARMAH, P. CHAKRAVARTY, and B. K. D. BORAH, “Effect of three concentrations of progesterone in the vaginal sponge for oestrus synchronization in yak”, Indian J of Anim Sci, vol. 82, no. 5, May 2012, Accessed: Oct. 27, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAnS/article/view/17688