Sarnowsky, Jürgen. “ 878 Pp”. Ordines Militares Colloquia Torunensia Historica. Yearbook for the Study of the Military Orders 20 (May 10, 2016): 286–287. Accessed June 10, 2023. https://apcz.umk.pl/OM/article/view/OM.2015.015.