1. Perforated duodenal ulcer at Reading, 1950 to 1959;Cassell, P.G.;Gut,1969
2. Prognosis and treatment in acute perforated peptic ulcer: a review of 206 cases;Gilmour, J.;Lancet,1953
3. Course of patients with perforated duodenal ulcers;Hofkin, G.A.;Amer. J. Surg,1966
4. Progress after perforated peptic ulcer;Illingworth, C.F.W.; Scott, L.D.W.; Jamieson, R.A.;Brit. med. J,1946
5. The treatment of acute perforated peptic ulcer by primary partial gastrectomy;Lowdon, A.G.R.;Lancet,1952