1. Alibek K, Handelman S (1999) Biohazard: the chilling true story of the largest covert biological weapons program in the world—told from inside by the man who ran it. Random House, New York
2. Brogan B (2006) We won’t scrap WMD stockpile unless Israel does, says Assad, The Telegraph (London), 6 January 2004
3. Carus WS (2000) The Rajneeshees. In: Tucker JB (ed) Toxic terror: assessing terrorist use of chemical and biological weapons. MIT Press, Cambridge, pp 115–137
4. Drogin B (2007) Curveball: spies, lies, and the con man who caused a war. Random House, New York
5. Gellman B (2002) 4 Nations thought to possess smallpox: Iraq, N. Korea Named, Two Officials Say, Washington Post, 5 November 2002, p A1