@book{87859,
	author = {Davis, Kathleen, and ebrary, Inc.},
	title = {Periodization and sovereignty},
	publisher = {University of Pennsylvania Press,},
	year = {c2008.},
	series = {Middle Ages series},
	address = {Philadelphia :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10576107}
}