Мулик (V’yacheslav Mulik) В. В., & Перепелиця (Pavlo Perepelitsa) П. Є. (2014). Improvement of indicators play activity footballers of younger school age at the expense experimental techniques. Slobozhanskyi Herald of Science and Sport, (1(39), 75–79. https://doi.org/10.15391/snsv.2014-1.014