Wszelaki, P., M. Wilczyński, B. P. Szmelcer, A. Florczak, A. Fortuna, D. Zaborna, N. Krakowska, A. Trzebiatowska, J. Ciepłuch, N. Skierkowska, M. Porada, M. Wąsicki, M. Modrzejewski, and K. Kędziora-Kornatowska. “Dysfunctions of the Immune System Associated With Age”. Journal of Education, Health and Sport, vol. 9, no. 6, May 2019, pp. 11-19, https://apcz.umk.pl/JEHS/article/view/6975.