Giuseppe Acciani Girolamo Fornarelli Luciano Liturri Comparing Fuzzy Data Sets by Means of Graph Matching Technique. 367-374 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2714&spage=367 2003 conf/icann/2003 ICANN db/conf/icann/icann2003.html#AccianiFL03