1. Peptic Ulcer: An Overview of Diagnosis
2. Richardson CT: Gastric ulcer. In, Sleisenger MH, Fordtran JS, Ingelfinger FJ, eds: Gastrointestinal Disease. Philadelphia : Saunders, 1978, pp 875-890
3. Sturdevant Ral, Walsh JH: Duodenal ulcer. In, Sleisenger MH , Fordtran JS, Ingelfinger FJ, eds: Gastrointestinal Disease. Philadelphia : Saunders, 1978, pp 840-859
4. Clinical Strategy in Peptic Ulcer