ŻUKOWSKI, Przemysław Marcin. Urszula Perkowska (7 November 1942 – 25 August 2017). Acta Poloniae Historica, [S. l.], v. 117, p. 403–409, 2018. DOI: 10.12775/18418. Disponível em: https://apcz.umk.pl/APH/article/view/18418. Acesso em: 1 feb. 2026.