MÄESALU, Mihkel. The communication of the Master of the Livonian Branch of the Teutonic Order with the King of Denmark and the Grand Duke of Lithuania during the 15th century. Ordines Militares Colloquia Torunensia Historica. Yearbook for the Study of the Military Orders. Online. 9 November 2021. Vol. 26, pp. 139-177. [Accessed 27 July 2024]. DOI 10.12775/OM.2021.007.