1. Resolution of the European Council, Strengthening the common European policy on security and defense, Cologne, Germany, June 3–4, 1999.
2. Wolf Jr. C, Zycher B. European Military Prospects, Economic Constraints, and the Rapid Reaction Force, RAND Report MR-1416-OSD/SRF, 2001.
3. Towards a Space Agency for the European Union. Report to the ESA Director General, November 2000. p. 9 (This report is widely known as the “Wise Men Report”).
4. McLean A, Lovie F. Europe's final frontier: the search for security through space. Commack, NY: Nova Science Publishers, 1997.
5. Survey of Europe. The Economist, October 23, 1999. p. 9.