Andrzej Burda, Demokracja i praworządność [Democracy and Rule of Law], Wrocław-Warszawa-Kraków 1965, Ossolineum. Contemporary Central & East European Law, [S. l.], n. 7-8, p. 46–47, 1967. Disponível em: https://czasopisma.inp.pan.pl/index.php/cceel/article/view/1740. Acesso em: 6 oct. 2025.