Pal, Madan, et al. “Surgical Removal Of Urolith By Prescrotal Urethrotomy In A Bull: A Case Report”. Indian Journal of Veterinary Sciences and Biotechnology, vol. 10, no. 4, Apr. 2015, pp. 78-79, https://acspublisher.com/journals/index.php/ijvsbt/article/view/2948.