J. . Kaczynski, G. . Hansso, and S. . Wallerstedt, “Incidence, Etiologic Aspects and Clinicopathologic Features in Intrahepatic Cholangiocellular Carcinoma: A Study of 51 Cases From a Low-Endemicity Area”, AO, vol. 37, no. 1, pp. 77–83, Jan. 1998.