1. Choledochoscopy;Ashby;Clin Gastroenterol,1978
2. Die Choledochopapilloskopie hebst bemerkungen uder hepaticus-drainage und dilatation der papille;Bakes;Arch Klin Chir,1923
3. An instrument for visualising the interior of the common duct at operation. Preliminary note;McIver;Surgery,1941
4. Endoscopy of the biliary tract;Wildegans;German Med Monthly,1958