1. Operative cholangiography;Schulenberg,1966
2. Pancreatic reflux during operative cholangiography;Cuschieri;Br J Surg,1973
3. Tratado de Patalogia Quirurgica;Davies,1970
4. Gallstone migration as a cause of acute pancreatitis;Acosta;N Engl J Med,1974
5. Micro-organisms in the bile, a preventable cause of sepsis after biliary surgery;Keighley;Ann Roy Coll Surg Eng,1977