Giorgos Mountrakis Peggy Agouris Learning Similarity with Fuzzy Functions of Adaptable Complexity. 412-429 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2750&spage=412 2003 conf/ssd/2003 SSTD db/conf/ssd/sstd2003.html#MountrakisA03