1. Acute perforated gastroduodenal ulceration;DeBakey;Surgery,1940
2. Die diagnosis der Darmperforation mit hilfe der Rontgendurchleuchtung;Popper;Deutsche med. Wchnschr.,1915
3. Roentgen ray in the diagnosis of perforated peptic ulcer;Vaughn;J.A.M.A.,1925
4. A consideration of the present status of simple suture in the treatment of acute perforated gastroduodenal ulceration;Mage;Surg. Gynec. & Obst.,1952
5. Pneumoperitoneum in perforations of the gastrointestinal tract;Paine;Surgery,1938