Kounchev, Ognyan, René Willems, Velizar Shalamanov, and Tsvetomir Tsachev. NATO ARW: Scientific Support for Decision Making in the Security Sector. Amsterdam: IOS Press, 2007.

Kounchev, Ognyan, René Willems, Velizar Shalamanov, and Tsvetomir Tsachev. Scientific Support for the Decision Making in the Security Sector. Amsterdam: IOS Press, 2007.