MROZEWICZ, L. Na ziemi Mattiaków. Studia Europaea Gnesnensia, [S. l.], n. 20, p. 143–146, 2019. DOI: 10.14746/seg.2019.20.8. Disponível em: https://pressto.amu.edu.pl/index.php/seg/article/view/23609. Acesso em: 28 sty. 2023.