Cormac Flanagan Rajeev Joshi Xinming Ou James B. Saxe Theorem Proving Using Lazy Proof Explication. 355-367 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2725&spage=355 2003 conf/cav/2003 CAV db/conf/cav/cav2003.html#FlanaganJOS03