Jeremy E. Dawson Rajeev Goré A General Theorem on Termination of Rewriting. 100-114 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3210&spage=100 2004 conf/csl/2004 CSL db/conf/csl/csl2004.html#DawsonG04