The Law of December 29, 1989 on Employment: Dz. U. 1989 Nr 75, poz. 446. Contemporary Central & East European Law, [S. l.], n. 2(86), p. 101–112, 1990. Disponível em: https://czasopisma.inp.pan.pl/index.php/cceel/article/view/1287. Acesso em: 6 oct. 2025.