@book{47813,
	author = {Pop, Petrica C. and ebrary, Inc.},
	title = {Generalized network design problems},
	publisher = {De Gruyter,},
	year = {2012.},
	series = {De Gruyter series in discrete mathematics and applications ;},
	address = {Berlin ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10634452}
}