Detail https://www.xponat.net/exponate/detail?tx_pixxponat_exhibitdetail%5Baction%5D=show&tx_pixxponat_exhibitdetail%5Bcontroller%5D=Exhibit&tx_pixxponat_exhibitdetail%5BexhibitId%5D=50&cHash=011a942a35bf028b09c59ab5629d1427
Links zum Thema http://methodenpool.uni-koeln.de/download/clustering.pdf führt
