KLEYMENOVA M.D.; VITKO S.U.; ZVYAGINTSEV P.N.; Shсherbina A.F.; IVANOV V.A. Optimization of operational control in physical education using digital technologies based on heart rate indicators. Theory and Practice of Physical Culture, [S. l.], n. 6, p. 40–42, 2025. Disponível em: http://tpfk.ru/index.php/TPPC/article/view/1382. Acesso em: 5 dec. 2025.