Milashechkina E.A., Rusanova E.I., Dzhandarova T.I., and Gernet M.S. “ProOrganization of Circadian Rhythms of Sex Hormone Secretion in Female Students With Vegetative-Vascular Dystonia of the Hypertensive Type Involved in Fitball Gymnastics”. Theory and Practice of Physical Culture, no. 5, June 2024, pp. 55-57, http://tpfk.ru/index.php/TPPC/article/view/1027.