@book{4103,
	author = {Nanda, S. and Das, N. R.},
	title = {Fuzzy mathematical concepts /},
	publisher = {Alpha Science Intl Ltd,},
	year = {2010.},
	address = {[S.l.] :},
	url = {http://www.amazon.com/exec/obidos/ASIN/1842655809/chopaconline-20}
}