Salvatore Greco Roman Slowinski Jerzy Stefanowski Evaluating Importance of Conditions in the Set of Discovered Rules. 314-321 2007 conf/rsfdgrc/2007 RSFDGrC http://dx.doi.org/10.1007/978-3-540-72530-5_37 db/conf/rsfdgrc/rsfdgrc2007.html#GrecoSS07