Leonova, Y. ., A. . Bondar, and S. . Stadnyk. “IMPROVING THE EFFICIENCY OF MANAGEMENT OF DOMESTIC FITNESS CLUBS IN MODERN CONDITIONS OF FUNCTIONING”. Slobozhanskyi Herald of Science and Sport, no. 6(80), Dec. 2020, pp. 81-86, https://journals.uran.ua/index.php/1991-0177/article/view/224743.