@book{109060,
	author = {Golumbic, Martin Charles. and Trenk, Ann N. and ebrary, Inc.},
	title = {Tolerance graphs},
	publisher = {Cambridge University Press,},
	year = {2004.},
	series = {Cambridge studies in advanced mathematics ;},
	address = {Cambridge, UK ;},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10124740}
}