Marc Lohmann Stefan Sauer Tim Schattkowsky ProGUM-Web: Tool Support for Model-Based Development of Web Applications. 101-105 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2863&spage=101 2003 conf/uml/2003 UML db/conf/uml/uml2003.html#LohmannSS03