1. Observer variation in the endoscopic diagnosis of esophageal varices;Conn, H.O.; Smith, H.W.; Brodoff, M.;New England Journal of Medicine,1965
2. Early endoscopy of oesophagus, stomach, and duodenal bulb in patients with haematemesis and melaena;Cotton, P.B.; Rosenberg, M.T.; Waldram, R.P.L.; Axon, A.T.R.;British Medical Journal,1973
3. Early endoscopic diagnosis in upper gastrointestinal hemorrhage;Hedberg, S.E.;Surgical Clinics of North America,1966
4. Comparative study between endoscopy and radiology in acute upper gastrointestinal haemorrhage;Hoare, A.M.;British Medical Journal,1975
5. Panendoscopy in the early diagnosis of acute upper gastrointestinal bleeding;Katon, R.M.; Smith, F.W.;Gastroenterology,1973