1. Python Software Foundation. Python success stories; also available in http://www.python.org/about/success/ 2009. Python Software Foundation. Python success stories; also available in http://www.python.org/about/success/ 2009.
2. Daniel G. Shafer. Python streamlines space shuttle mission design; also available in http://www.python.org/about/success/usa/ 2003. Daniel G. Shafer. Python streamlines space shuttle mission design; also available in http://www.python.org/about/success/usa/ 2003.