BRZOSTEK, Mariusz. Problems of Regionalization in the Light of the Schengen Zone. Dialogi Polityczne, [S. l.], n. 25, p. 81–93, 2018. DOI: 10.12775/DP.2018.017. Disponível em: https://apcz.umk.pl/DP/article/view/DP.2018.017. Acesso em: 8 lip. 2025.