1. Becker HD (1983) Chirurgie des blutenden Ulkus. Z Gastroenterol 21: 290
2. Brooks JB, Eraklis AJ (1965) Factors affecting mortality from peptic ulcer. N Engl J Med 271: 803
3. Donahue PE, Nyhus LM (1980) Surgery for massive upper gastrointestinal hemorrhage. In: Fiddian-Green RG, Turcotte JG (eds) Gastrointestinal hemorrhage. Grune & Stratton, New York, pp 129–146
4. Dronfield SW, Atkinson M, Langman MJS (1979) Effect of different operation policies on mortality from bleeding peptic ulcer. Lancet 1: 1126
5. Dykes PW, Keighley MB (1981) Gastrointestinal hemorrhage: Critique of methods and timing for treatment of acute non variceal bleeding. Wright, Bristol, pp 365–376