PATRYAS, Wojciech. An Attempt to Formulate a Preliminary Definition of the Validity of Norms. Przegląd Prawniczy Uniwersytetu im. Adam Mickiewicza, [S. l.], v. 11, p. 37–55, 2020. DOI: 10.14746/ppuam.2020.11.02. Disponível em: https://pressto.amu.edu.pl/index.php/ppuam/article/view/29572. Acesso em: 21 nov. 2024.