1. Spontaneous free perforation of the small intestine;Orringer;Dis Col Rectum,1983
2. Free perforation of the small intestine;Rajagopalan;Ann Surg,1982
3. Nontraumatic perforation of the small intestine;Leijonmarck;Acta Chir Scand,1984
4. Typhoid perforation of the intestine;Eustache;Arch Surg,1983
5. Typhoid perforation of the bowel: experience in 78 cases;Eggleston;Ann Surg,1979