DUCH, Michał. The integration process of the Lower Moesian areas. Studia Europaea Gnesnensia, [S. l.], v. 16, n. 16, p. 371–398, 2017. DOI: 10.14746/seg.2017.16.18. Disponível em: https://pressto.amu.edu.pl/index.php/seg/article/view/30069. Acesso em: 15 paź. 2024.