A. V. Mutyev, Y. A. Kovalenko, and D. V. Lebedev, “Staffing of school physical education in the Crimea in the 1920s–30s”, Pedagogika, vol. 89, no. 9, pp. 94–101, Sep. 2025, Accessed: Nov. 08, 2026. [Online]. Available: https://ojs.owebs.ru/pedagogika/article/view/30474