1. Rutkow IM. The origins of modern surgery, surgery-basic science and clinical evidence. New York: Springer Verlag, Inc.; 2001. pp. 2–19.
2. Bandelier AF. Aboriginal trephining in Bolivia. Am Anthrpol. 1904;6:440–6.
3. Fairley HB. Anesthesia in the Inca empire. Rev Esp Anestesiol Reanim. 2007;54:556–62.
4. The Code of Hammurabi Trans LW King Yale Law School. http.//Avalon.lawyale.edu/ancient/hamframe.asp Accessed: 31 January, 2010.
5. Breasted JHT. Edwin Smith Papyrus. University of Chicago Oriental Institute, Chicago: University of Chicago Press; 1930. p. 177.