Zukow, W., Flyunt, I.-S., Ruzhylo, S., Koval’chuk, H., Nahurna, Y., Popovych, D. and Sarancha, S. (2021) “Forecasting of multivariant changes in Step test under the influence of natural adaptogens”, Pedagogy and Psychology of Sport, 7(1), pp. 85–93. doi: 10.12775/PPS.2021.07.01.005.