White, Barbara, ‘Duval, Claude, d.1670’, Oxford Dictionary of National Biography (Oxford: Oxford University Press, 2004), online edition, January 2008, http://www.oxforddnb.com/view/article/8333, accessed 2 September 2015. См. также http://www.stand-and-deliver.org.uk/highwaymen/newgate_duval.htm, accessed 2 September 2015.
