Czarnecki, Piotr, Justyna Podgórska-Bednarz, and Lidia Perenc. “Forms of Physical Activity of the Elderly”. European Journal of Clinical and Experimental Medicine 18, no. 3 (September 30, 2020): 221–228. Accessed January 18, 2026. https://journals.ur.edu.pl/ejcem/article/view/11843.