@book{36481,
	author = {Boschma, Ron A. and Kloosterman, Robert C. and SpringerLink (Online service)},
	title = {Learning from Clusters},
	publisher = {Springer Netherlands,},
	year = {2005.},
	series = {The GeoJournal Library,},
	address = {Dordrecht :},
	url = {http://dx.doi.org/10.1007/1-4020-3679-5}
}