1. Associated Press. Scientist plants radioactive material in rival's office. September 29 2003. September 29,
2. BBC News. November 7 2006. “Al-Qaeda plotter jailed for life”. November 7, Accessed athttp://news.bbc.co.uk/2/hi/uk_news/6123236.stm
3. BBC News. November 6 2006. “Man ‘planned massive explosions.’”. November 6, Accessed athttp://news.bbc.co.uk/2/hi/uk_news/6120560.stm
4. BBC News. July 27 2007. “Timeline: Litvinenko death case”. July 27, Accessed athttp://news.bbc.co.uk/2/hi/uk_news/6179074.stm
5. ADDRESSING THE PSYCHOSOCIAL AND COMMUNICATION CHALLENGES POSED BY RADIOLOGICAL/NUCLEAR TERRORISM: KEY DEVELOPMENTS SINCE NCRP REPORT NO. 138