EU Security and Defence, Core documents 2004 In
ESDP Presidency Report. Paris: Institute for Security Studies, 2005.
Kaldas, Kai-Helin. The Evolution of Estonian Security Options During the 1990s In
Athena Papers. Vol. 4. Garmisch-Partenkirchen: Partnership for Peace Consortium of Defense Academies and Security Studies Institutes, 2005.