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2. Avant, Deborah. (2004) “The Privatization of Security and Change in the Control of Force.” International Studies Perspectives 5: 153–157.
3. Avant, Deborah D. (2005) The Market for Force: The Consequences of Privatizing Security. Cambridge: Cambridge University Press.
4. Brooks, Doug. (2000) “Write a Cheque, End a War.” Conflict Trends, June: 33–35.
5. Brooks, Doug. (2006). Testimony for the Committee on Government Reform, Subcommittee on National Security, Emerging Threats, and International Relations. Washington, D.C. (June 13).