FAVREAU-LILIE, Marie-Luise. In memoriam: Hans Eberhard Mayer (1932‒2023). Ordines Militares Colloquia Torunensia Historica. Yearbook for the Study of the Military Orders. Online. 30 December 2024. Vol. 29, pp. 365-367. [Accessed 21 February 2026]. DOI 10.12775/OM.2024.015.