1. Gibson JB (1978) Histological typing of tumors of the livers, biliary tract and pancreas. International Histological Classification of Tumors. No. 20, WHO, Geneva
2. Japan Liver Cancer Study Group (1987) The general rules for the clinical and pathological study of primary liver cancer (in Japanese), 2nd edn. Kanehara, Tokyo
3. Okuda K, Kubo Y, Okazaki N, Arishima T, Hashimoto M, Jinnouchi S, Sawa Y, Shimokawa Y, Nakajima Y, Noguchi T, Nakano M, Kojiro M, Nakashima T (1977) Clinical aspect of intrahepatic bile duct carcinoma including hilar carcinoma: A study of 57 autopsy-proven cases. Cancer 39: 232–246
4. Chen M-F, Jan Y-Y, Wang C-S, Benjamin Jeng LB, Hwang T-L, Chen S-C (1989) Intrahepatic stones associated with cholangiocarcinoma. Am J Gastroenterol 84: 391–395
5. Nakanuma Y, Terada T, Tanaka Y, Ohta G (1985) Are hepatolithiasis and cholangiocarcinoma etiologically related? A morphological study of 12 cases of hepatolithiasis associated with cholangiocarcinoma. Virchows Archiv A 406: 45–58