I.N. Medvedev, O.A. Razzhivin, A.V. Dorontsev and V.V. Belyaev (2023) “Functional features of the heart in cyclists”, Theory and Practice of Physical Culture, (4), pp. 46–48. Available at: http://tpfk.ru/index.php/TPPC/article/view/570 (Accessed: 4 May 2024).