Georgieva L, Żołądkiewicz K, Żukow W. Vitamin D concentration effect in health care and sport performance. Pedag Psychol Sport [Internet]. 2018 Mar. 31 [cited 2024 Jul. 17];4(2):53-70. Available from: https://apcz.umk.pl/PPS/article/view/PPS.2018.010