Paul Cockshott Andreas Koltes John O'Donnell Patrick Prosser Wim Vanderbauwhede A Hardware Relaxation Paradigm for Solving NP-Hard Problems. 75-86 2008 BCS Int. Acad. Conf. http://www.bcs.org/server.php?show=ConWebDoc.22853 conf/bcs/2008 db/conf/bcs/bcs2008.html#CockshottKOPV08