P・W・シンガー
"Corporate Warriors: the Rise of the Privatized Military Industry and Its Ramifications for International Security", International Security, vol. 26, no. 3, 2002.
"Peacekeepers, Inc.: Private-Sector Military Muscle Offers its Services", Policy Review, no. 119, 2003.
"War, Profits, and the Vacuum of Law: Privatized Military Firms and International Law", Columbia Journal of Transnational Law, vol. 42, no. 2, 2004.
"Outsourcing War", Foreign Affairs, vol. 84, no. 2, 2005.
"Private Actors, Humanitarian Agents: Implications of the Private Military Industry for the Humanitarian Community", Brown Journal of World Affairs, vol. 13, no. 1, 2006.