Jürgen Giesl Deepak Kapur Deciding Inductive Validity of Equations. 17-31 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2741&spage=17 2003 conf/cade/2003 CADE db/conf/cade/cade2003.html#GieslK03