@misc{Labus_Agnieszka_URBAN, author={Labus, Agnieszka}, howpublished={online}, language={eng}, abstract={This paper refers to the attempt to explain the processes of societies aging through a combination of research practice and theory. Cities wishing to pursue the idea of sustainable development should respond to the new challenges they face, includ- ing the society aging. The aim of the author is to identify the main directions of urban development in the twenty-first cen- tury in relation to the theory of aging which originated from various scientific disciplines.}, title={URBAN DEVELOPMENT OF CITIES IN THE 21st CENTURY IN THE CONTEXT OF THEORY OF AGING}, keywords={society aging, land use planning, spatial development, city planning, urban renewal, demographic theories, sociological theories, economic theories}, }