Wacław Szubert, Ochrona pracy. Studium społeczno-prawne. [Protection of Labour. Sociological-Legal Study], Warszawa 1966, PWN. Contemporary Central & East European Law, [S. l.], n. 9, p. 33–34, 1968. Disponível em: https://czasopisma.inp.pan.pl/index.php/cceel/article/view/1767. Acesso em: 6 oct. 2025.