@article{clusteringvalidityI,
	title = {Cluster validity methods: part I},
	address = {New York, NY, USA},
	author = {Maria Halkidi and Yannis Batistakis and Michalis Vazirgiannis},
	journal = {SIGMOD Rec.},
	number = {2},
	pages = {40--45},
	publisher = {ACM Press},
	volume = {31},
	year = {2002},
	biburl = {http://www.bibsonomy.org/bibtex/20c9357a4a95f1467e064a2b2ec834c29/gromgull},
	description = {ACM SIGMOD: Volume 31, Issue 2 , Cluster validity methods: part ...},
	issn = {0163-5808}, doi = {http://doi.acm.org/10.1145/565117.565124},
	keywords = {clustering evaluation }
}