1. T. Balint, Disruptive innovation: a comparison between government and commercial space, in: 64th International Astronautical Congress, Beijing, China, IAC–13–D1.3.3, October 2013.
2. G.E.P. Box, N.R. Draper, Empirical Model-Building and Response Surfaces, Wiley Series in Probability and Statistics, 1987. ISBN-10: 0471810339.
3. Every good regulator of a system mush be a model of that system;Conant;Int. J. Syst. Sci.,1970
4. Dialogue Mapping: Building Shared Understanding of Wicked Problems;Conklin,2006
5. HoR, FY15 Budget Charts, Committee on the Budget, House of Representatives, Website: 〈http://budget.house.gov/uploadedfiles/fy15_budget_charts.pdf〉 (accessed 04.05.2014).