Cyril Carrez Alessandro Fantechi Elie Najm Behavioural Contracts for a Sound Assembly of Components. 111-126 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2767&spage=111 2003 conf/forte/2003 FORTE db/conf/forte/forte2003.html#CarrezFN03