Tomás Recio Francisco Botana Where the Truth Lies (in Automatic Theorem Proving in Elementary Geometry). 761-770 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3044&spage=761 2004 conf/iccsa/2004-2 ICCSA (2) db/conf/iccsa/iccsa2004-2.html#RecioB04