Vlasiuk , O., A. Fedoriaka, and P. Shkarupilo. “The Use of Auxiliary Means for Developing Active Flexibility in Gymnasts Aged 8-9 Years”. Sportyvnyi Visnyk Prydniprovia, no. 1, Apr. 2024, pp. 108-14, doi:10.32540/2071-1476-2024-1-108.