@book{212867,
	author = {Harper, Lawrence H. and ebrary, Inc.},
	title = {Global methods for combinatorial isoperimetric problems},
	publisher = {Cambridge University Press,},
	year = {2004.},
	series = {Cambridge studies in advanced mathematics ;},
	address = {New York :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10124735}
}