Bart Goethals Wim Le Page Heikki Mannila Mining Association Rules of Simple Conjunctive Queries. 96-107 2008 SDM http://www.siam.org/proceedings/datamining/2008/dm08_09_goethals_le_page_mannila.pdf conf/sdm/2008 db/conf/sdm/sdm2008.html#GoethalsPM08