Paul, A. K., T. Yoisungnern, and N. Bunaparte. “Hormonal Treatment and Estrus Synchronization in Cows: A Mini-Review”. Journal of Advanced Veterinary and Animal Research, vol. 2, no. 1, Dec. 2014, pp. 10-17, https://banglajol.info/index.php/JAVAR/article/view/21248.