KIENIEWICZ, Jan. The Eastern Frontiers and the Civilisational Dimension of Europe. Acta Poloniae Historica, [S. l.], v. 107, p. 165–175, 2013. DOI: 10.12775/APH.2013.107.06. Disponível em: https://apcz.umk.pl/APH/article/view/APH.2013.107.06. Acesso em: 5 feb. 2025.