Shrestha, Mukunda Singh, et al. “Comparative Analysis of Preoperative Ultrasonography Reports With Intraoperative Findings in Cholelithiasis”. Medical Journal of Shree Birendra Hospital, vol. 22, no. 2, Dec. 2023, pp. 7-11, https://nepjol.info/index.php/MJSBH/article/view/66352.