Isabelle Dony Baudouin Le Charlier A Program Verification System Based on Oz. 41-52 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3389&spage=41 2004 conf/moz/2004 MOZ db/conf/moz/moz2004.html#DonyC04