B. N., Anandaravi, and Ramaswami B. “Closed Versus Open Lateral Internal Anal Sphincterotomy in a Chronic Anal Fissure”. International Surgery Journal 4, no. 3 (February 25, 2017): 1055–1058. Accessed November 7, 2025. https://www.ijsurgery.com/index.php/isj/article/view/881.