Porzych, Katarzyna, Anna Polak-Szabela, and Kajetan Hadzik. “Wisdom of the Elderly”. Medical and Biological Sciences 29, no. 2 (June 21, 2015): 33–35. Accessed August 16, 2024. https://apcz.umk.pl/MBS/article/view/MBS.2015.015.