SPUS, Redakcja. Studia Politicae Universitatis Silesiensis Tom 21. Studia Politicae Universitatis Silesiensis, [S. l.], v. 21, 2018. Disponível em: https://trrest.vot.pl/ojsus/index.php/SPUS/article/view/6451. Acesso em: 6 maj. 2025.