Administration in People’s Poland, éd. Janusz Łętowski, Wrocław 1980, Ossolineum. Contemporary Central & East European Law, [S. l.], n. 2 (50), p. 47–50, 1981. Disponível em: https://czasopisma.inp.pan.pl/index.php/cceel/article/view/1832. Acesso em: 6 oct. 2025.