@book{49162,
	author = {Gutin, Gregory, and ebrary, Inc.},
	title = {The traveling salesman problem and its variations},
	publisher = {Kluwer Academic Publishers,},
	year = {c2002.},
	series = {Combinatorial optimization ;},
	address = {Dordrecht ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10067445}
}