1. Fiscal Year 2013 Progress Report. [Internet];Implementation of Federal Prize Authority,2014
2. Center of Excellence for Collaborative Innovation [Internet]. Washington DC: National Aeronautics and Space Administration.; c2011–15 [updated 2015 Feb 11; cited 2015 Feb 15]. Available from: http://www.nasa.gov/offices/COECI/index.html.
3. Implementation of Federal Prize Authority: Progress Report. [Internet],2012
4. NASA Policy Directive 1090.1 [Internet]. [updated 2014 Feb 12; cited 2015 Feb 15]. Available from: http://nodis3.gsfc.nasa.gov/displayDir.cfm?t=NPD&c=1090&s=1.
5. Centennial Challenges Program [Internet]. Washington DC: National Aeronautics and Space Administration; c2005–15 [updated 2015 Feb 12; cited 2015 Feb 15]. Available from: http://www.nasa.gov/challenges.