1. Peptic Ulcer;Ivy,1950
2. Pathology;Anderson,1948
3. Giant benign duodenal ulcer: Report of a case;Evashwick;Ann. Surg.,1951
4. Das groose Ulcus duodeni im Rontgenbild;Brdiczka;Fortschr. a. d. Geb. d. Rontgenstrahlen,1931
5. Diagnostic errors in ulcerative lesions of the stomach and duodenum;Friedman;Am. J. Roentgenol.,1940