@book{5573,
	author = {Dubois, Didier.},
	title = {Fundamentals of fuzzy sets /},
	publisher = {Kluwer Academic,},
	year = {c2000.},
	address = {Boston :},
	url = {http://www.loc.gov/catdir/enhancements/fy0820/99049471-d.html}
}