Chindarkar, H., Dumbre, R., Fernandes, A. and Phalgune, D. 2018. Study of correlation between pre-operative ultrasonographic findings and difficult laparoscopic cholecystectomy. International Surgery Journal. 5, 7 (Jun. 2018), 2605–2611. DOI:https://doi.org/10.18203/2349-2902.isj20182782.