1. Becker J (2010) Web of shell companies veils trade by iran’s ships. The New Yourk Times, 7 June 2010.
http://www.nytimes.com/2010/06/08/world/middleeast/08sanctions.html
2. Boyd JR (1995) The essence of winning and losing, 28 June 1995.
http://www.danford.net/boyd/essence.htm
3. Nederlandse Kustwacht (2009) De nederlandse kustwacht.
http://www.kustwacht.nl/sites/default/files/StencilKWjeugdnw_0.pdf
4. Wikipedia (2012) Situation awareness.
http://en.wikipedia.org/wiki/Situation_awareness