Bunkar, Shiv K., Sushil Yadav, Amit Singh, Kalpana Agarwal, Preeti Sharma, and Amar C. Sharma. 2017. “Factors Predicting Difficult Laparoscopic Cholecystectomy: A Single Institution Experience”. International Surgery Journal 4 (5):1743-47. https://doi.org/10.18203/2349-2902.isj20171632.