<hi xmlns="http://www.tei-c.org/ns/1.0" rend="bold">Scaife, Mike / Rogers, Yvonne</hi> (1996): „External cognition: how do graphical representations work?“, in: <hi xmlns="http://www.tei-c.org/ns/1.0" rend="italic">International Journal of Human-Computer Studies</hi> 45 (2): 185–213.