Abdula, A. B., and S. I. Lebedev. “Features of Physiological Responses on Organism of Football Players Aged 10-12 Years in Exercise Using Different Training Methods”. Physical Education of Students 18, no. 1 (February 28, 2014): 3–7. Accessed March 27, 2023. https://sportedu.org.ua/index.php/PES/article/view/214.