The Law on Economic Activity of December 23, 1988: Dz.U. 1988 Nr 41, poz. 324. Contemporary Central & East European Law, [S. l.], n. 3-4(79-80), p. 97–102, 1988. Disponível em: https://czasopisma.inp.pan.pl/index.php/cceel/article/view/1353. Acesso em: 6 oct. 2025.