Imed Hammouda Olcay Guldogan Kai Koskimies Tarja Systä Tool-Supported Customization of UML Class Diagrams for Learning Complex System Models. 24-33 2004 conf/iwpc/2004 IWPC http://csdl.computer.org/comp/proceedings/iwpc/2004/2149/00/21490024abs.htm db/conf/iwpc/iwpc2004.html#HammoudaGKS04