Zashchirinskaya O.V., Ilina N.L., Arkhipova E.V., and Medina N.A. Bracamonte. “Motivation of Athletes: Individual and Group Running Lessons”. Theory and Practice of Physical Culture, no. 11, Jan. 2025, pp. 54-56, http://tpf1610220.nichost.ru/index.php/TPPC/article/view/1177.