KOWERSKI, Mieczysław; BIELAK, Jarosław. Fifty Issues of Regional Barometer. Regional Barometer. Analyses & Prognoses, [S. l.], v. 15, n. 4, p. 163–170, 2018. DOI: 10.56583/br.418. Disponível em: https://czaz.akademiazamojska.edu.pl/index.php/br/article/view/418. Acesso em: 16 apr. 2025.