Carol Britton Maria Kutar Sue Anthony Trevor Barker Sarah Beecham Vitoria Wilkinson An Empirical Study of User Preference and Performance with UML Diagrams. 31-33 2002 conf/vl/2002 HCC http://csdl.computer.org/comp/proceedings/hcc/2002/1644/00/16440031abs.htm db/conf/vl/hcc2002.html#BrittonKABBW02