1. Centers for Disease Control and Prevention (CDC), 2005. Acute radiation syndrome: a fact sheet for physicians. Retrieved December 25, 2006 from 〈http://www.bt.cdc.gov/radiation/arsphysicianfactsheet.asp〉.
2. Department of Homeland Security (DHS), 2002. National Response Plan. Initial Draft. Retrieved December 28, 2006 from 〈http://www.nemaweb.org/docs/national_response_plan.pdf〉.
3. Department of Homeland Security (DHS), 2004. National Response Plan. Retrieved December 28, 2006 from 〈http://www.dhs.gov/xprepresp/committees/editorial_0566.shtm〉.
4. Department of Homeland Security (DHS), 2006a. Remarks by Secretary of Homeland Security Michael Chertoff at the Brookings Institution, Washington, DC, June 1, 2006. Retrieved January 27, 2007 from 〈http://www.dhs.gov/xnews/speeches/speech_0283.shtm〉.
5. Department of Homeland Security (DHS), 2006b. Preparedness and Response. Retrieved December 25, 2006 from 〈http://www.dhs.gov/xprepresp/〉.