RUSZKOWSKI, J. The Fuzzy Set Method in the Studies on the Multilevel Political System of the European Union. UNIO – EU Law Journal, [S. l.], v. 1, p. 27–39, 2019. DOI: 10.21814/unio.1.3. Disponível em: https://revistas.uminho.pt/index.php/unio/article/view/281. Acesso em: 5 may. 2024.