1. Subcutaneous duodenal rupture;Amberger;Zentralbl. f. Chir.,1931
2. Occurrence, clinical picture, and treatment of perforated gastric and duodenal ulcers;Bager;Acta chir. Scandin.,1929
3. Traumatic extraperitoneal rupture of the duodenum;Blasker;Brit. Med. Jour.,1934
4. Multiple acute perforated duodenal ulcers;Dowdle;Jour. Mich. State Med. Soc.,1935
5. Operative treatment of perforated ulcer of the stomach;Feller;Deutsch. Ztschr. f. Chir.,1924