V. Silin, M. Malikov, and A. Svatiev, “CHANGE PECULIARITIES OF THE FUNCTIONAL STATE OF THE CARDIORESPIRATORY SYSTEM OF FOOTBALL PLAYERS AT THE AGE OF 15-17 UNDER THE INFLUENCE OF THE EXPERIMENTAL PROGRAM OF ANNUAL MICROCYCLE TRAINING SESSION”, SJPU, vol. 45, no. 2, pp. 143-151, Aug. 2021.