Ivashchenko, Olha, Hanna Berezhna, and Mirosława Cieślicka. “Motor Skills in the Structure of Physical Fitness of 7-Year-Old Boys”. Journal of Learning Theory and Methodology 1, no. 1 (June 30, 2020): 14–19. Accessed August 12, 2026. https://www.ltmjournal.com/e/article/view/3.