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 March 11, 2026. https://archive-journals.rtu.lv/sie/article/view/2671.