Elke Achtert Christian Böhm Jörn David Peer Kröger Arthur Zimek Robust Clustering in Arbitrarily Oriented Subspaces. 763-774 2008 SDM http://www.siam.org/proceedings/datamining/2008/dm08_69_AchtertBoehmDavidKroegerZimek.pdf conf/sdm/2008 db/conf/sdm/sdm2008.html#AchtertBDKZ08