The current state of the market of fitness services in the Republic of Kazakhstan and the city of Almaty. JRBA [Интернет]. 30 ноябрь 2016 г. [цитируется по 1 сентябрь 2026 г.];116(4/2). доступно на: https://be.kaznu.kz/index.php/math/article/view/1347