#	Person	Titel	Jahr
1	Creighton, M.	A History of the Papacy During the Period of the Reformation : vol. 1, The Great Schism-the Council of Constance, 1378-1418	1882
2	Creighton, M.	A History of the Papacy During the Period of the Reformation : vol. 2, The Council of Basel-the Papal Restoration, 1418-1464	1882
3	Hollis, Christopher	Urbi et orbi : das Papsttum und seine Geschichte	1964