Khudolii, O., P. Bartík, D. Ivanov, and A. Bezzub. “Didactics: Peculiarities of Motor Skills Development in Boys Aged 14-15”. Physical Education Theory and Methodology, vol. 21, no. 4, Dec. 2021, pp. 381-8, doi:10.17309/tmfv.2021.4.14.