Agarwal, D., Arora, D., Avasthi, A., Kothari, A., & Dangayach, K. K. (2016). Study of 292 patients for prediction of difficult laparoscopic cholecystectomy using detailed history, clinical and radiological parameters. International Surgery Journal, 3(1), 349–353. https://doi.org/10.18203/2349-2902.isj20160258