Кузьменко, Ірина. “Investigation of the Cardiovascular System of Schoolchildren Aged 13–14 Years”. Slobozhanskyi Herald of Science and Sport, no. 6(62) (December 30, 2017): 60–63. Accessed November 24, 2024. https://journals.uran.ua/index.php/1991-0177/article/view/118715.