OBRĘBSKA, Marta; WRÓBEL, Sylwester. City categories and their position in polish local self-government system. Political Preferences, [S. l.], n. 13, 2016. Disponível em: https://trrest.vot.pl/ojsus/index.php/PP/article/view/4909. Acesso em: 7 may. 2025.