DEMEL, Bernhard. The policy of the Livonian branch of the Teutonic Order towards the Holy Roman Empire in the years 1521 to 1561/62. Ordines Militares Colloquia Torunensia Historica. Yearbook for the Study of the Military Orders, [S. l.], v. 20, p. 145–172, 2016. DOI: 10.12775/OM.2015.007. Disponível em: https://apcz.umk.pl/OM/article/view/OM.2015.007. Acesso em: 8 oct. 2026.