Ivashchenko, O., M. Nosko, M. Cieślicka, and D. Malyshev. 2019. “Motor Abilities: Peculiarities of Strength Effort Assessment in Boys Aged 11–13”. Teorìâ Ta Metodika Fìzičnogo Vihovannâ 19 (1), 37-43. https://doi.org/10.17309/tmfv.2019.1.05.