Anderson, Kenneth. “Targeted Killing in US Counterterrorism Strategy and Law.” Legislating the war on terror: an agenda for reform. Brookings Institution Press, Washington DC 346 (2009). https://papers.ssrn.com/sol3/Delivery.cfm/SSRN_ID1415070_code235051.pdf?abstractid=1415070&mirid=4.
Mayer, Jane. “The Predator War.” The New Yorker, October 26, 2009. http://www.newyorker.com/magazine/2009/10/26/the-predator-war.
O’Connell, Mary Ellen. “Unlawful Killing with Combat Drones: A Case Study of Pakistan, 2004-2009.” Research Paper, Notre Dame: Notre Dame Law School (2010). https://www.law.upenn.edu/institutes/cerl/conferences/targetedkilling/papers/OConnellDrones.pdf.
Parks, W. Hays. “Memorandum On Executive Order 12333 and Assassination.” International Law Branch, International Affairs Division, November 2, 1989. http://www.hks.harvard.edu/cchrp/Use%20of%20Force/October%202002/Parks_final.pdf
Vogel, Ryan J. “Drone Warfare and the Law of Armed Conflict.” Denver Journal of International Law and Policy 39 (2010): 101. http://papers.ssrn.com/sol3/papers.cfm?abstract_id=1759562.