B. C. Das, S. Rana, O. Siddique, A. Dutta, M. Chowdhury, and M. N. H. Bhuyan, “Importance of Serum CA 19-9 Level in Hepatolithiasis Patients Undergoing Liver Resection: serum CA 19-9 level in hepatolithiasis”, J. Surg. Sci., vol. 26, no. 1, pp. 10–14, Feb. 2022.