A. R. M, M. Simadibrata, I. Hasan, S. Suhendro, and E. Mudjadid, “Difference in the Faecal Elastase-1 Concentration between Resectable and Unresectable Pancreatic Cancer”, InaJGHE, vol. 21, no. 2, pp. 99–107, Sept. 2020.