Elke Achtert Christian Böhm Hans-Peter Kriegel Peer Kröger Arthur Zimek On Exploring Complex Relationships of Correlation Clusters. 7 2007 conf/ssdbm/2007 SSDBM http://doi.ieeecomputersociety.org/10.1109/SSDBM.2007.21 db/conf/ssdbm/ssdbm2007.html#AchtertBKKZ07