MALAH, O. “ASSESSMENT OF THE FUNCTIONAL STATE OF CHILDREN INVOLVED IN COMPETITIVE BALLROOM DANCING BY HEART RATE VARIABILITY”. Vestnik of Polotsk State University. Part E. Pedagogic Sciences, no. 7 (August 15, 2019): 142-146. Accessed July 22, 2024. https://journals.psu.by/pedagogical/article/view/136.