KOZIOŁ, W. Labor productivity in Poland in the regional breakdown. Social Inequalities and Economic Growth, [S. l.], v. 4, n. 52, p. 95–105, 2020. DOI: 10.15584/nsawg.2017.4.6. Disponível em: https://journals.ur.edu.pl/nsawg/article/view/1119. Acesso em: 17 may. 2024.