Markus Lumpe Jean-Guy Schneider Bastiaan Schönhage Markus Bauer Thomas Genssler Composition Languages. 107-118 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3013&spage=107 2003 conf/ecoopw/2003 ECOOP Workshops db/conf/ecoopw/ecoopw2003.html#LumpeSSBG03