NISHANT, K.; BHUTIA, P.; KUMAR SINGH, V.; KHARGA, B.; KUMAR SHARMA, B.; JAIN, N. Prediction of difficult laparoscopic cholecystectomy while working up the patient for surgery. Surgical Review: International Journal of Surgery, Trauma and Orthopedics, v. 3, n. 4, p. 107-113, 31 Dec. 2017.