Łosień T, Mędrak A, Plaskacz P, Bajerska I, Reut M, Dragon E, et al. Physical activity of children aged 1-4. J Educ Health Sport [Internet]. 2018 Jun. 30 [cited 2025 Jan. 24];8(6):406-11. Available from: https://apcz.umk.pl/JEHS/article/view/6076