Kubas, Sebastian. „Similarities and Differences of Main Left Wing Parties in Poland and Hungary: The Case of SLD and MSzP in Comparative Perspective (1989—2014)”. Studia Politicae Universitatis Silesiensis 13 (marzec 19, 2017). Udostępniono maj 6, 2025. https://trrest.vot.pl/ojsus/index.php/SPUS/article/view/5468.