1. Operative choledochoscopy using an experimental choledochoscope;Ashby;Gut,1976
2. Die Choledochopapilloskopie, nebst Bemerkungen über Hepaticusdrainage und Dilatation der Papille;Bakes;Arch. Klin. Chir.,1923
3. Retained bile duct stones;Bergdahl;Acta Chir. Scand.,1976
4. Retained calculi within the biliary ductal system;Glenn;Ann. Surg.,1974
5. Non-malignant bile duct obstruction;Havard;Ann. R. Coll. Surg. Engl.,1960