KOWALSKA, Jolanta Elżbieta and KOWALEWSKI, Michał. Opinions of physical education teachers about the preparation of teachers of early school education to carry out physical activities in classes I-III. Journal of Education, Health and Sport. Online. 14 May 2020. Vol. 10, no. 5, pp. 111-117. [Accessed 8 July 2025]. DOI 10.12775/JEHS.2020.10.05.010.