Pablo Romero Benedict du Boulay Richard Cox Rudi Lutz Sallyann Bryant Debugging strategies and tactics in a multi-representation software environment. 992-1009 2007 65 International Journal of Man-Machine Studies 12 http://dx.doi.org/10.1016/j.ijhcs.2007.07.005 db/journals/ijmms/ijmms65.html#RomeroBCLB07