1. Wilkinson G (2007). Safety criteria - getting it right. Safety Systems, The SafetyCritical Systems Club Newsletter. Volume 16, Number 3, May 2007.
2. MoD (1996). Safety Management Requirements for Defence Systems, Def Stan 00-56. Issue 2, 13 December 1996 (note that, while superseded, this standard is often quoted as it contains information on techniques that has not yet been incorporated elsewhere)
3. US DoD (2000). Department of Defense, Standard Practice for System Safety, Mil Std 882D, 10 February 2000
4. US DoD (2005). Department of Defense, Standard Practice for System Safety, Mil Std 882E draft 2, January 2005
5. CAA (2003), CAP 728, Management of Safety, Issue 1, 28 March 2003, ISBN 0 86039 9 12 5