Paul, Ashit, Ton Yoisungnern, and Napolean Bunaparte. “Hormonal Treatment and Estrus Synchronization in Cows: A Mini-Review”. Journal of Advanced Veterinary and Animal Research 2, no. 1 (December 20, 2014): 10-17. Accessed August 11, 2020. https://www.banglajol.info/index.php/JAVAR/article/view/21248.