1. Badell-Sánchez, Diego. “The Age of Outsourcing: UN Peacekeeping Operations.’ In Peacekeeping: Global Perspectives, Challenges and Impacts, edited by Pablo Antonio Fernández Sánchez, 125–38. New York: Nova Science Publishers, 2018.
2. Bernales B., Enrique. Use of Mercenaries as a Means of Violating Human Rights and Impeding the Exercise of the Right of Peoples to Self-determination. UN doc. E/ CN.4/2004/15, December 24, 2003.
3. Bianchetti, Orlando. The Role of Private Military Security Companies in the New Generation of UN Peacekeeping Missions. Université de Lausanne / Universität Zürich, 2016.
4. Brooks, Doug. “Write a Cheque, End a War Using Private Military Companies to End African Conflicts.” Confl ict Trends, no. 6 (June 2000): 33–35. https://www.accord.org.za/publication/conflict-trends-2000-1/.
5. Cameron, Lindsey. The Privatization of Peacekeeping: Exploring Limits and Responsibility under International Law. Cambridge: Cambridge University Press, 2017.