Bhardwaj, Rajni, Rajandeep Singh Bali, and Yawar Zahoor. “Pre-Operative Factors for Predicting a Difficult Laparoscopic Cholecystectomy”. International Surgery Journal 5, no. 9 (August 25, 2018): 2991–2994. Accessed February 20, 2026. https://www.ijsurgery.com/index.php/isj/article/view/3252.