Мулик [V’yacheslav Mulik] В. В.; Перепелиця [Pavlo Perepelica] П. Є. Experimental methods increases level technique and tactical to preparedness footballers middle school age. Slobozhanskyi Herald of Science and Sport, [S. l.], n. 3(36), p. 44–48, 2013. Disponível em: https://journals.uran.ua/index.php/1991-0177/article/view/20473. Acesso em: 4 may. 2024.