Arumugam, Ramesh, and Karthick Pandurengan. “Pre-Operative Prediction of Difficult Laparoscopic Cholecystectomy”. International Surgery Journal 2, no. 4 (December 14, 2016): 584–589. Accessed April 16, 2026. https://www.ijsurgery.com/index.php/isj/article/view/774.