KUMAR, A.; SINGH, K. V.; SHAKYA, J. P. S.; SAHU, S.; DHIMAN, S.; AGRAWAL, N. Prediction of difficulties during laparoscopic cholecystectomy by preoperative clinical examination and ultrasonography. International Surgery Journal, [S. l.], v. 4, n. 4, p. 1335–1340, 2017. DOI: 10.18203/2349-2902.isj20171137. Disponível em: https://www.ijsurgery.com/index.php/isj/article/view/1082. Acesso em: 10 nov. 2025.