SKICA, Tomasz; DZYUMA-ZAREMBA, Ulyana; HADY, Joanna. Clusters in Regional Politics. Regional Barometer. Analyses & Prognoses, [S. l.], v. 13, n. 2, p. 43–55, 2015. DOI: 10.56583/br.860. Disponível em: https://czaz.akademiazamojska.edu.pl/index.php/br/article/view/860. Acesso em: 16 apr. 2025.