1. The international politics of space;Sheehan,2007
2. European approach to space security;Pasco,2009
3. The physics of space security: a reference manual;Wright,2005
4. Resolution on the European space policy. Brussels,2007
5. It has to be noted that other organizations play an important role in certain sectoral issue-areas, such as the EUMETSAT for example, the European Organisation for the exploitation of meteorological satellites. The situation is even further complicated by the fact that the membership of these three institutions (EUMETSAT, ESA and the EU) doesn’t necessarily match.