Mykhaliuk, Y. L., V. V. Syvolap, Y. Y. Horokhovskyi, and M. S. Potapenko. “Effect of Year-Round Training on Parameters of Heart Rate Variability, Central Hemodynamics and Physical Working Capacity in Short-Distance Swimmers”. Zaporozhye Medical Journal, vol. 23, no. 3, June 2021, pp. 343-7, doi:10.14739/2310-1210.2021.3.229452.