@book{104783,
	author = {Vatsa, B. S. and Vatsa, Suchi. and ebrary, Inc.},
	title = {Discrete mathematics},
	publisher = {New Age International,},
	year = {c2009.},
	address = {New Delhi :},
	edition = {4th rev. ed.},
	note = {Includes index.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10359397}
}