Коновалов [V. Konovalov] В. В.; Касьян [A. Kas’an] А. В.; Череднiченко [A. Cherednichenko] А. В. Optimal physical activity of students in the initial period of training. Slobozhanskyi Herald of Science and Sport, [S. l.], n. 3(36), p. 16–19, 2013. Disponível em: https://journals.uran.ua/index.php/1991-0177/article/view/20457. Acesso em: 17 aug. 2024.