The Law of December 29, 1989 on Employment: Dz. U. 1989 Nr 75, poz. 446. CC&EEL [Internet]. 1990 Dec. 31 [cited 2025 Oct. 6];(2(86):101-12. Available from: https://czasopisma.inp.pan.pl/index.php/cceel/article/view/1287