James Bailey Thomas Manoukian Kotagiri Ramamohanarao Classification Using Constrained Emerging Patterns. 226-237 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2762&spage=226 2003 conf/waim/2003 WAIM db/conf/waim/waim2003.html#BaileyMR03