KWIATKOWSKI, Krzysztof. Nicholas Edward Morton, The Teutonic Knights in the Holy Land 1190–1291. Ordines Militares Colloquia Torunensia Historica. Yearbook for the Study of the Military Orders. Online. 1 July 2012. Vol. 17, pp. 211-213. [Accessed 27 April 2024]. DOI 10.12775/NO_DOI_2012_05.