1. Acute retroperitoneal abscess and phlegmon;Neuhoe;Ann. Surg.,1944
2. Appendicitis: Its Diagnosis and Treatment;Deaver,1914
3. Perforating inflammation of the vermiform appendix;Fitz;Tr. A. Am. Physicians,1886
4. Psoas abscess of the appendix;McCorkle;Surgery,1938
5. Retroperitoneal pathognomonic roentgen sign: Two cases of ruptured appendix with positive roentgen findings;Bird;Am. J. Roentgenol.,1948