1. Endoskopische sphincterotomie der papilla vateri und steinextraktion aus ductus choledochus;Classen, M.; Demling, L.;Dtsh Med Wochenschr,1974
2. Endoscopic sphincterotomy of the ampulla of Vater;Kawai, K.; Akasaka, Y.; Murakami, K.; Tada, M.; Nakajima, M.;Gastrointest Endosc,1974
3. Non operative removal of bile duct stones by duodenoscopic sphincterotomy;Cotton, P.B.;Br J Surg,1980
4. British experience with duodenoscopic sphincterotomy for removal of bile duct stones;Cotton, P.B.; Vallon, A.G.;Br J Surg,1981
5. La sphincterotomie endoscopique. Contribution belge a l'experience mondiale;Cremer, M.; Gulbis, A.; Toussaint, J.; De Toeuf, J.; Van Laethem, A.; Hermanus, A.;Acta Gastroenterol Belg,1977