Kovalevskaya, Ekaterina, Irina Kolbasova, and Elena Karpenko. “ACTUAL MENTAL STATE OF STUDENTS IN PROCESS OF PHYSICAL EDUCATION CLASSES”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference 6 (May 20, 2020): 245–254. Accessed May 8, 2024. https://journals.rta.lv/index.php/SIE/article/view/4900.