Droit administratif: Dz.U. 1961, Nr 5, poz 30. Contemporary Central & East European Law, [S. l.], n. 1, p. 54–57, 2019. Disponível em: https://czasopisma.inp.pan.pl/index.php/cceel/article/view/1635. Acesso em: 6 oct. 2025.