@book{5330,
	author = {Lowen, R.},
	title = {Fuzzy set theory :},
	publisher = {Kluwer Academic Publishers,},
	year = {c1996.},
	address = {Dordrecht ;},
	url = {http://www.loc.gov/catdir/enhancements/fy0822/96015901-d.html}
}