Борисова [Olga Borisova] О. В. Professional sport: development prospects in Ukraine (on tennis material). Slobozhanskyi Herald of Science and Sport, [S. l.], n. 1(34), p. 29–34, 2013. Disponível em: https://journals.uran.ua/index.php/1991-0177/article/view/17952. Acesso em: 17 jul. 2024.