MYŚLIWIEC, Karol. (ET=EtudTrav/50) x 30. Études et Travaux, [S. l.], n. 31, p. 9–16, 2018. DOI: 10.12775/EtudTrav.31.001. Disponível em: https://apcz.umk.pl/ET/article/view/EtudTrav.31.001. Acesso em: 27 cze. 2026.