WILK, K.; SOWADA, C.; KRUK, W. Ageing of Polish society and NFZ expenses on long-term care from 2004 to 2010 – regional differentiation. European Journal of Clinical and Experimental Medicine, [S. l.], v. 11, n. 3, p. 279–287, 2013. Disponível em: https://journals.ur.edu.pl/ejcem/article/view/12627. Acesso em: 27 feb. 2026.