PETRILIONIS, Antanas. William Urban. The Last Years of the Teutonic Knights: Lithuania, Poland and the Teutonic Order. Ordines Militares Colloquia Torunensia Historica. Yearbook for the Study of the Military Orders. Online. 15 October 2019. Vol. 24, pp. 389-391. [Accessed 4 July 2025]. DOI 10.12775/OM.2019.019.