SMYK, Grzegorz. Polish Precursors of United Europe. In: Great Theorists of Central European Integration. [s.l.] : Legal Studies on Central Europe,2023. p. 357–391. DOI: 10.54171/2023.mg.gtocei_10. Disponível em: https://books.ceapublishing.hu/index.php/lsce/catalog/book/15/chapter/130. Acesso em: 5 aug. 2025.