KUBIN, Tomasz. Economic System of the European Union. Between Particularism and Universalism. Studia Politicae Universitatis Silesiensis, [S. l.], v. 14, 2017. Disponível em: https://journals.us.edu.pl/index.php/SPUS/article/view/5455. Acesso em: 5 grudz. 2025.