PRABHAKAR, S, et al. “Changes in Plasma Cortisol Concentrations As an Index of Stress Due to Dystocia and Obstetrical Manoeuvring in Buffaloes”. The Indian Journal of Animal Sciences, vol. 72, no. 4, Feb. 2014, https://epubs.icar.org.in/index.php/IJAnS/article/view/37557.