1. Arimatsu, L., & Choudhury, M. (2014). The Legal Classification of Armed Conflicts in Syria, Yemen and Libya (International Paper PP 2014/0). Chatham House. Retrieved from https://www.chathamhouse.org/sites/files/chathamhouse/home/chatham/public_html/sites/default/files/20140300ClassificationConflictsArimatsuChoudhury1.pdf
2. Terrorism and Armed Conflict: Insights from a Law & Literature Perspective
3. Reprisals involving recourse to armed force.;D.Bowett;The American Journal of International Law,1972
4. Bush, G. W. (2001, September 20). Address Before a Joint Session of the Congress on the United States Response to the Terrorist Attacks of September 11. The American Presidency Project. Retrieved from http://www.presidency.ucsb.edu/ws/?pid=64731