Serge Demeyer Stéphane Ducasse Kim Mens Adrian Trifu Rajesh Vasa Filip Van Rysselberghe 72-85 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3013&spage=72 2003 conf/ecoopw/2003 ECOOP Workshops db/conf/ecoopw/ecoopw2003.html#DemeyerDMTVR03