Medvedeva E.N., Terekhina R.N., and Viner I.A. “COMPLEXITY OF COMBINING ELEMENTS OF STRUCTURAL GROUPS OF RHYTHMIC GYMNASTICS AS A CRITERION OF PERFORMANCE SKILL OF SPORTSWOMAN”. Theory and Practice of Physical Culture, no. 9, Sept. 2023, pp. 3-6, http://tpfk.ru/index.php/TPPC/article/view/664.