Hannes Heikinheimo Jilles Vreeken Arno Siebes Heikki Mannila Low-Entropy Set Selection. 569-580 2009 SDM http://www.siam.org/proceedings/datamining/2009/dm09_053_heikinheimoh.pdf conf/sdm/2009 db/conf/sdm/sdm2009.html#HeikinheimoVSM09