Hubert Comon-Lundh Ralf Treinen Easy Intruder Deductions. 225-242 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2772&spage=225 2003 conf/birthday/2003manna Verification: Theory and Practice db/conf/birthday/Manna2003.html#Comon-LundhT03