Grygus, I.M., and T.V. Kucher. “Optimizing the Level of the Physical Health of the Students With a Glance of the Type of Autonomic Nervous System”. Physical Education of Students 17, no. 3 (June 28, 2013): 26–30. Accessed July 26, 2026. https://sportedu.org.ua/index.php/PES/article/view/288.