NIEDZIELSKA, M. Iron-nail war landmarks in West and East Prussia during the Great War. Klio - Czasopismo Poświęcone Dziejom Polski i Powszechnym, [S. l.], v. 55, p. 231–252, 2020. DOI: 10.12775/KLIO.2020.042. Disponível em: https://apcz.umk.pl/KLIO/article/view/KLIO.2020.042. Acesso em: 1 grudz. 2021.