Mikhailov, N. ., P. E. . Lubyshev, M. . Agashin, and A. . Kavokin. “Wave Simulators As a Means of Preventing Covid-19”. 2022. Theory and Practice of Physical Culture, no. 4, Apr. 2022, pp. 45-48, http://tpfk.ru/index.php/TPPC/article/view/186.