@book{82487,
	author = {Fujishige, Satoru. and ebrary, Inc.},
	title = {Submodular functions and optimization},
	publisher = {Elsevier,},
	year = {2005.},
	series = {Annals of discrete mathematics ;},
	address = {Boston :},
	edition = {2nd ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10138461}
}