@book{7115,
	author = {Grabisch, Michel.},
	title = {Aggregation Functions /},
	publisher = {Cambridge University Press,},
	year = {2009.},
	series = {Encyclopedia of mathematics and its applications ;},
	address = {Cambridge :},
	url = {http://www.loc.gov/catdir/enhancements/fy1004/2009288694-b.html}
}