Afanasyev, Sergiy, and Kirill Burdayev. “Formation of the Vertical Stability of the Body of Junior Schoolchildren With Hearing Impairments in the Process of Physical Education”. Journal of Education, Health and Sport 7, no. 6 (June 30, 2017): 1169–1178. Accessed June 4, 2023. https://apcz.umk.pl/JEHS/article/view/5501.