Pazdnikova N.P., Opletin A.A., Romanov V.V., and Maksimova A.V. “Complex of Test Exercises: The Key to Success in children’s Sports”. Theory and Practice of Physical Culture, no. 11, Jan. 2025, pp. 31-34, http://tpf1610220.nichost.ru/index.php/TPPC/article/view/1168.