Fedorchenko, R. A., V. L. Mykhaylenko, V. V. Taranov, and N. S. Badiuk. “Diseases of the Nervous System Among Schoolchildren and Youth in Modern Training Conditions”. Journal of Education, Health and Sport, vol. 7, no. 3, Mar. 2017, pp. 606-13, https://apcz.umk.pl/JEHS/article/view/4443.