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 IEEE Symposia on Human Centric Computing Languages and Environments http://computer.org/proceedings/hcc/1644/16440031abs.htm db/conf/hccl/hccl2002.html#BrittonKABBW02