Henderson, Jon (26 August 2007). "Shock and oar". The Observer. Guardian News and Media Limited. Archived from the original on 20 November 2009. Retrieved 14 December 2008.
Henderson, Jon (26 August 2007). "Shock and oar". The Observer. Guardian News and Media Limited. Archived from the original on 20 November 2009. Retrieved 14 December 2008.