Mateusz Szpytma, The Risk of Survival. The Rescue of the Jews by the Poles and the Tragic Consequences for the Ulma Family from Markowa. Zeitschrift für Ostmitteleuropa-Forschung, [S. l.], v. 60, n. 1, p. 129–136, 2011. DOI: 10.25627/20116019170. Disponível em: https://openjournals.osmikon.de/zfo/article/view/9170. Acesso em: 16 sep. 2026.