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, vol. 24, Oct. 2019, pp. 389-91, doi:10.12775/OM.2019.019.