EWA POŚPIECH; ADRIANNA MASTALERZ-KODZIS. Economic Activity of the Population by Age in the European Union Countries. Journal of Advanced Research in Social Sciences, [S. l.], v. 2, n. 3, p. 24–35, 2020. DOI: 10.33422/jarss.v2i3.287. Disponível em: https://www.dpublication.com/journal/JARSS/article/view/287. Acesso em: 10 oct. 2025.