SUMOWSKI, Marcin. Secular clergymen in the castles of the Teutonic Order in Prussia. Ordines Militares Colloquia Torunensia Historica. Yearbook for the Study of the Military Orders. Online. 30 December 2018. Vol. 23, pp. 203-234. [Accessed 16 June 2024]. DOI 10.12775/OM.2018.008.