Бахаєддин, А. А., Т. С. Бондар, А. С. Голик, А. Х. Дейнеко, and І. Г. Біленька. “Some Factors That Influence the Attitude of Schoolchildren to the System of Physical Education”. Slobozhanskyi Herald of Science and Sport, no. 1, Apr. 2011, pp. 111-3, https://journals.uran.ua/index.php/1991-0177/article/view/39971.