Крылов, Дмитрий, and Людмила Шестерова. “Assessment of Technique of Tennis Players of Ten Years Old”. Slobozhanskyi Herald of Science and Sport, no. 4(54) (August 31, 2016): 62–67. Accessed May 5, 2024. https://journals.uran.ua/index.php/1991-0177/article/view/76518.