Act of 25th february, 1964 on the issue of legal regulations by the People’s Councils: Dz.U. Nr 8, poz 47. Contemporary Central & East European Law, [S. l.], n. 5, p. 66–68, 1965. Disponível em: https://czasopisma.inp.pan.pl/index.php/cceel/article/view/1727. Acesso em: 6 oct. 2025.