Идрисова, Наталия. “Physical Education Problems of 5–9 Grade Pupils in the Context of Health Preservation”. Slobozhanskyi Herald of Science and Sport, no. 4(60) (August 31, 2017): 48–52. Accessed October 20, 2024. https://journals.uran.ua/index.php/1991-0177/article/view/109008.