@book {2008,
	title = {Das Papsttum am Vorabend des Investiturstreits. Stephan IX. (1057-1058), Benedict X. (1058) und Nikolaus II. (1058-1061)},
	series = {P{\"a}pste und Papsttum},
	volume = {36},
	year = {2008},
	pages = {247},
	publisher = {Anton Hiersemann},
	organization = {Anton Hiersemann},
	address = {Stuttgart},
	isbn = {978-3-7772-0801-5},
	author = {H{\"a}germann, Dieter}
}
