GÓRKA, Kazimierz; ŁUSZCZYK, Marcin. Two-Speed Europe. Political Declarations or Economic Facts. Regional Barometer. Analyses & Prognoses, [S. l.], v. 15, n. 4, p. 23–30, 2018. DOI: 10.56583/br.399. Disponível em: https://czaz.akademiazamojska.edu.pl/index.php/br/article/view/399. Acesso em: 18 apr. 2025.