@book{6087,
	author = {Nanda, S. and Das, N. R.},
	title = {Fuzzy Mathematical Concepts },
	publisher = {Narosa Publishing House},
	year = {2010.},
	address = {New Delhi},
	url = {http://www.amazon.com/exec/obidos/ASIN/1842655809/chopaconline-20}
}