Karpińska, A., P. Łopatka, B. Wrzesiński, E. Piechocka, P. Wojtczak, and A. Ziółkowska. “The Key Role of Physical Exercise in the Prevention and Treatment of Osteoporosis”. Journal of Education, Health and Sport, vol. 8, no. 8, July 2018, pp. 563-70, https://apcz.umk.pl/JEHS/article/view/5691.