@book{5575,
	author = {Höhle, Ulrich.},
	title = {Mathematics of fuzzy sets :},
	publisher = {Kluwer Academic Publishers,},
	year = {c1999.},
	series = {The handbooks of fuzzy sets series ;},
	address = {Boston :},
	url = {http://www.loc.gov/catdir/enhancements/fy0820/98045584-d.html}
}