1. Biliary obstruction, cholangitis and choledocholithiasis;Way,1989
2. Choledocholithiasis;Berk,1985
3. Pigment gallstone disease;Trotman;Gastroenterol Clin North Am,1991
4. “Portal biliopathy” in extrahepatic portal vein obstruction;Sarin;Indian J Gastroenterol,1992
5. The veins of the extrahepatic biliary system and their pathologic-anatomic significance [in German];Petern;Verh Anat Ges,1932