@book{34648,
	author = {Du, Dingzhu. and Hu, Xiaodong. and ebrary, Inc.},
	title = {Steiner tree problems in computer communication networks},
	publisher = {World Scientific,},
	year = {c2008.},
	address = {Singapore ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10255725}
}