SOROKIN, D. . Improvement of physical qualities during sensitive periods in middle-distance track and field athletes. Theory and Practice of Physical Culture, [S. l.], n. 1, p. 27–29, 2026. Disponível em: http://tpf1610220.nichost.ru/index.php/TPPC/article/view/1561. Acesso em: 4 feb. 2026.