Mishra, P.C., et al. “Efficacy Of Different Hormonal Protocols For Oestrous Induction In Postpartum Anoestrous And Suboestrous Cows ”. Indian Journal of Veterinary Sciences and Biotechnology, vol. 7, no. 2, Oct. 2011, pp. 11-14, https://acspublisher.com/journals/index.php/ijvsbt/article/view/3233.