Ujma-Wąsowicz, K. 2013. Places of Physical Exercise as a Valuable Environment for Maintaining Physical and Intellectual Fitness of Older Persons. Acta Universitatis Lodziensis. Folia Oeconomica. 297 (Jan. 2013), 55–64. DOI:https://doi.org/10.18778/0208-6018.297.05.