OLIŃSKI, Piotr. Bernhart Jähnig, Verfassung und Verwaltung des Deutschen Ordens und seiner Herrschaft in Livland. Ordines Militares Colloquia Torunensia Historica. Yearbook for the Study of the Military Orders, [S. l.], v. 17, p. 206–207, 2012. DOI: 10.12775/NO_DOI_2012_03. Disponível em: https://apcz.umk.pl/OM/article/view/NO_DOI_2012_03. Acesso em: 9 mar. 2025.