Mulla, Sameer Ahmed, Srinivas Pai, and Dishita Shetty. “Ultrasound Abdomen As a Tool to Predict Difficult Cholecystectomy”. International Surgery Journal 7, no. 4 (March 26, 2020): 1247–1250. Accessed November 10, 2025. https://www.ijsurgery.com/index.php/isj/article/view/5872.