1. Duodenoscopic sphincterotomy and gallstone removal;Safrany;Gastroenterology,1977
2. An improved choledofiberscope and nonsurgical removal of retained biliary calculi under direct visual control;Yamakawa;Endoscopy,1976
3. Continuous endoscopic pancreatocholedocho catheterization;Nagai;Gastrointest Endosc,1976
4. A new catheter for endoscopic manometry of Oddi's sphincter;Rosch;Endoscopy,1977
5. Third International Symposium of Digestive Endoscopy,1977