Detail https://www.xponat.net/exponate/detail?tx_pixxponat_exhibitdetail%5Baction%5D=show&tx_pixxponat_exhibitdetail%5Bcontroller%5D=Exhibit&tx_pixxponat_exhibitdetail%5BexhibitId%5D=248&cHash=dee8f8063a42ce50a500753a270ec49e
Links zum Thema http://methodenpool.uni-koeln.de/download/clustering.pdf führt
