GUPTA, G.; SHARMA, P. K.; GUPTA, S.; BHARDWAJ, A. Pre and per operative prediction of difficult laparoscopic cholecystectomy using clinical and ultrasonographic parameters. International Journal of Research in Medical Sciences, [S. l.], v. 3, n. 11, p. 3342–3346, 2017. DOI: 10.18203/2320-6012.ijrms20151188. Disponível em: https://www.msjonline.org/index.php/ijrms/article/view/1910. Acesso em: 15 oct. 2025.