@article{Hardy1996,
	title = {On the number of clusters},
	author = {Andr{\'e} Hardy},
	day = {15},
	journal = {Computational Statistics \& Data Analysis},
	month = {Nov},
	number = {1},
	pages = {83--96},
	url = {http://www.sciencedirect.com/science/article/B6V8V-3SWT44Y-6/1/62a5596069089b60c0388cac27cda686},
	volume = {23},
	year = {1996},
	biburl = {http://www.bibsonomy.org/bibtex/2d50efcc4800b391829fe15b3ec0b9507/smicha},
	keywords = {Cluster analysis }
}