Antonyrajan, Snolin Shiromi. “Role of Preoperative Upper Gastrointestinal Endoscopy in Patients With Symptomatic Cholelithiasis: A Prospective Study”. International Surgery Journal 13, no. 9 (August 26, 2026): 1666–1673. Accessed August 27, 2026. https://www.ijsurgery.com/index.php/isj/article/view/12269.