1. Significant armed conflicts 2004. Available at: www.infoplease.com/ipa/A0904550.html. Accessed April 16, 2005.
2. Deaths in wars and conflicts between 1945 and 2000;Leitenberg,2003
3. The reluctant surgeon;Kobler,1960
4. The rise of surgery – from empiric craft to scientific discipline;Wangensteen,1979
5. Great ideas in the history of surgery;Zimmermann,1967