1. Gastroduodenal hemorrhage: difficulties in recognition of lesions at operation by palpation and inspection;Rappaport;Ann. Int. Med.,1953
2. Observations on the vigorous diagnostic approach to severe upper gastrointestinal hemorrhage;Palmer;Ann. Int. Med.,1952
3. A new method of recognizing ulcers of the upper digestive tract and localizing them;Einhorn;Med. Record,1909
4. Evaluation of the Einhorn string test;Rafsky;Rev. Gastroentero1.,1952