DYGO, M. Paweł Grochowski. Chrystian: biskup Prus 1216–1245 i misja pruska jego czasów. Górna Grupa: Wydawnictwo Verbinum, 2018. 500 pp., 34 photographs, 22 drawings. ISBN: 978-83-7192-552-8. Ordines Militares Colloquia Torunensia Historica. Yearbook for the Study of the Military Orders, [S. l.], v. 25, p. 451–455, 2020. DOI: 10.12775/OM.2020.022. Disponível em: https://apcz.umk.pl/OM/article/view/OM.2020.022. Acesso em: 25 apr. 2024.