Hans-Peter Kriegel Peer Kröger Erich Schubert Arthur Zimek Outlier Detection in Axis-Parallel Subspaces of High Dimensional Data. 831-838 2009 PAKDD http://dx.doi.org/10.1007/978-3-642-01307-2_86 conf/pakdd/2009 db/conf/pakdd/pakdd2009.html#KriegelKSZ09