JASTRZĘBSKA, E.; LEGUTKO-KOBUS, P. Initiatives for people aged 50+ implemented by municipalities and enterprises in the Opole special demographic zone. Economics and Environment, [S. l.], v. 68, n. 1, p. 11, 2019. Disponível em: https://ekonomiaisrodowisko.pl/journal/article/view/111. Acesso em: 1 may. 2024.