WARŻAŁA, Rafał. Specialization and business cycles fluctuations of Polish regions. Managerial Economics, [S. l.], v. 16, n. 2, p. 175, 2016. DOI: 10.7494/manage.2015.16.2.175. Disponível em: https://journals.agh.edu.pl/manage/article/view/1892. Acesso em: 9 apr. 2025.