Nada Lavrac Branko Kavsek Peter A. Flach Ljupco Todorovski Subgroup Discovery with CN2-SD. 153-188 2004 5 Journal of Machine Learning Research http://www.ai.mit.edu/projects/jmlr//papers/volume5/lavrac04a/lavrac04a.pdf db/journals/jmlr/jmlr5.html#LavracKFT04