1. 1. Japanese Society of Biliary Surgery. General Rules for Surgical and Pathological Studies on Cancer of the Biliary Tract, 5th edn, Kanehara, Tokyo, pp 1-65, 2003. (in Japanese)
2. 2. Mizumoto R. Treatment strategy for hilar carcinoma of the bile duct. Geka Chiryo 1999; 80:1255-1256. (in Japanese)
3. 3. Klatskin G. Adenocarcinoma of hepatic duct at the bifurcation within the porta hepatis. An usual tumor; distinctive clinical and pathological features. Am J Med 1965; 38:241-256.
4. 4. Nimura Y. Treatment of hilar cholangiocarcinoma; present and future perspective. Geka 2003; 65:663-668. (in Japanese)
5. 5. Couinaud C. Surgical anatomy of the liver revisited. self-publication, Paris, pp 39-53, 1989.