Nikiforova, O.N., E.V. Markin, and A.A. Soparev. “The Effect of Physical Activity on the Dynamics of Myocardial Bioelectrical Activity in Students”. Theory and Practice of Physical Culture, no. 3 (April 18, 2026): 39–42. Accessed April 18, 2026. http://www.tpfk.ru/index.php/TPPC/article/view/1613.