@book{229991,
	author = {Peeva, Ketty. and Kyosev, Yordan. and ebrary, Inc.},
	title = {Fuzzy relational calculus},
	publisher = {World Scientific,},
	year = {2004.},
	series = {Advances in fuzzy systems ;},
	address = {New Jersey :},
	url = {http://site.ebrary.com/lib/strathmore/Doc?id=10173954}
}