Bhardwaj R, Bali RS, Zahoor Y. Pre-operative factors for predicting a difficult laparoscopic cholecystectomy. Int Surg J [Internet]. 2018 Aug. 25 [cited 2025 Nov. 10];5(9):2991-4. Available from: https://www.ijsurgery.com/index.php/isj/article/view/3252