@book{243640,
	author = {Wilf, Herbert S., and ebrary, Inc.},
	title = {Algorithms and complexity},
	publisher = {A.K. Peters,},
	year = {c2002.},
	address = {Natick, Mass. :},
	edition = {2nd ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10159701}
}