Niedorys, Barbara, Monika Mikos, Klaudia Michalczyk, Joanna Młynarczyk, Marcin Stanisław Rząca, and Agnieszka Bartoszek. 2018. “Thecarer’s Burden of an Elderly Person According Functional Capacity of an Elderly Person”. Journal of Education, Health and Sport 8 (12):327-34. https://apcz.umk.pl/JEHS/article/view/6377.