@book{62130,
	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-t.html}
}