Matczak, Dawid, and Marta Wieczorek. “Assessing the Effectiveness of Learning a Complex Motor Activity in Children Aged 9-10 Years”. Journal of Education, Health and Sport 12, no. 6 (June 16, 2022): 158–169. Accessed April 25, 2024. https://apcz.umk.pl/JEHS/article/view/38725.