Singh, C, and M L Madan. 2012. “Ovarian Response to Equine Chorionic Gonadotrophin. (eCG) and GnRH in Buffalo Heifers (Bubalus Bubalis)”. The Indian Journal of Animal Sciences 69 (7). https://epubs.icar.org.in/index.php/IJAnS/article/view/20879.