MROZEWICZ, L. Trudna stabilizacja…. Studia Europaea Gnesnensia, [S. l.], n. 20, p. 141–142, 2019. DOI: 10.14746/seg.2019.20.7. Disponível em: https://pressto.amu.edu.pl/index.php/seg/article/view/23608. Acesso em: 31 sty. 2023.