1. Control as a Dimension of Public-Space Quality;Francis,1989
2. An Overview of Age-Friendly Cities and Communities Around the World
3. EUROSTAT
https://ec.europa.eu/eurostat/statistics-explained/index.php/Population_structure_and_ageing#The_share_of_elderly_people_continues_to_increase
4. Aging Europe Statistical Book. Looking at the Lives of Older People in the EU,2019
5. Information on the Situation of Seniors Based on Research by the Central Statistical Office,2018