Rozdział: Public health problems in the context of the aging population of Poland / K. Sygit, M. Sygit, M. Pietrzak, J. Krakowiak. - // W: Health Problems in Ukraine and Poland / ed. by Oleh Lyubinets, Katarzyna Sygit. - Lviv : Editorial House of the Lviv Regional Charity Fund "Medicine and Law", 2017 (WorkId 16044)