CNN, "U.S. authorities capture 'dirty bomb' suspect," June 10, 2002.

Charles D. Ferguson, Tahseen Kazi, and Judith Perera, "Commercial Radioactive Sources: Surveying the Security Risks," Center for Nonproliferation Studies, Occasional Paper No. 11, January 2003.

 Charles D. Ferguson and William C. Potter with Amy Sands, Leonard S. Spector, and Fred L. Wehling, The Four Faces of Nuclear Terrorism (New York: Routledge, 2005).

International Atomic Energy Agency, Power Reactor Information System.

Nuclear Threat Initiative, NIS Trafficking database.

William J. Broad, "Document Reveals 1987 Bomb Test by Iraq," New York Times, April 29, 2001.

Gavin Cameron, "Nuclear Terrorism: Reactors & Radiological Attacks After September 11," November 2001, p. 18.

Council on Foreign Relations, Terrorism: Questions & Answers, "Terrorism: An Introduction," 2004.

Gavin Cameron, "Nuclear Terrorism: Reactors & Radiological Attacks After September 11," November 2001, p. 7.

William Potter, "Less Well-Known Cases of Nuclear Terrorism and Nuclear Diversion in the Former Soviet Union," August 1997.

Friedrich Steinhausler, "What it takes to become a nuclear terrorist," American Behavioral Scientist, Vol. 46 No. 6, February 2003, p. 789.

Joel Grimm, Presentation at the Health Physics Society Annual Meeting, San Diego, California, July 21, 2003.

The International Basic Safety Standards for Protection against Ionizing Radiation and the Safety of Radiation Sources.

International Atomic Energy Agency, "Inadequate Control of World's Radioactive Sources," press release and table sent to Congressman Edward Markey from the Nuclear Regulatory Commission, July 21, 2003, covering the past five-year period of reported orphan source cases within the United States.

Joel O. Lubenau, "Security Risks of Radioactive Material."

M. Bunn and G. Bunn, "Reducing the Threat of Nuclear Theft and Sabotage," p. 11.

Nuclear Regulatory Commission, “Nuclear Security Enhancements Since September 11, 2001,” February 2005.

IAEA, Categorization of Radioactive Sources.

World Nuclear Association, Information and Issue Briefs.

Gregory J. Van Tuyle, et al., "Reducing RDD Concerns Related to Large Radiological Source Applications," Los Alamos National Laboratory, LA-UR-03-6664, September 2003.

Nuclear Policy Research Area, Managing the Atom Project.

Stanford University, Center for International Security and Cooperation, Nuclear Terrorism.

Union of Concerned Scientists, Nuclear Safety.

Nuclear Energy Institute, Safety and Security.

Nuclear Control Institute, Nuclear Terrorism.

Public Broadcasting Service (PBS), Dirty Bomb; Nuclear Reaction.

Council on Foreign Relations, Terrorism: Questions and Answers, Dirty Bombs.

FAS Public Interest Report, Dirty Bombs: Response to a Threat.

International Physicians for the Prevention of Nuclear War, "Radiological Dispersion Weapons: Health, Social and Environmental Effects."

How Stuff Works, "How Dirty Bombs Work"; "How Nuclear Power Works"; "How Nuclear Radiation Works."

Charles D. Ferguson and Joel O. Lubenau, “Securing U.S. Radioactive Sources,” Issues on Science and Technology, Fall 2003.

Peter Zimmerman with Cheryl Loeb, “Dirty Bombs: The Threat Revisited,” Defense Horizons, January 2004.