Gupta, S., K. Anand, P. Paliwal, and A. S. Baghel. “Validation of Intra-Operative Scoring System for Difficult Laparoscopic Cholecystectomy”. International Surgery Journal, vol. 9, no. 11, Oct. 2022, pp. 1842-50, doi:10.18203/2349-2902.isj20222939.