Sobyanin, F. ., . I. Isaev, S. . Makashev, and V. . Krivchenkov. “Stages of Emergence and Development of Freestyle Wrestling in the West Kazakhstan Region of the Republic of Kazakhstan”. Theory and Practice of Physical Culture, no. 4, Apr. 2022, pp. 57-59, http://tpfk.ru/index.php/TPPC/article/view/189.