GIERCZYCKA, Jadwiga. The role of the European Union regional policy in the development of Upper Silesia. The Scientific Journal European Policies, Finance and Marketing, [S. l.], n. 1(50), p. 173–185, 2009. DOI: 10.22630/PEFIM.2009.1.50.13. Disponível em: https://pefim.sggw.edu.pl/article/view/1622. Acesso em: 10 nov. 2026.