CZAJA, Roman. In memoriam: Stefan F. Kwiatkowski (1946‒2022). Ordines Militares Colloquia Torunensia Historica. Yearbook for the Study of the Military Orders, [S. l.], v. 28, p. 279–280, 2023. DOI: 10.12775/OM.2023.010. Disponível em: https://apcz.umk.pl/OM/article/view/48153. Acesso em: 31 jan. 2025.