Wheeb, Muhannad Ayal, et al. “Incidence of Needle Knife Precut Sphincterotomy in a Sample of Patients Attending Gastroenterology and Hepatology Teaching Hospital in Baghdad”. International Journal of Integrative and Modern Medicine, vol. 3, no. 6, June 2025, pp. 123-31, https://medicaljournals.eu/index.php/IJIMM/article/view/1939.