Drzał-Grabiec, Justyna, Sławomir Snela, Karol Bibrowicz, and Beata Szczepanowska-Wołowiec. “Body Posture of Children Aged 7–9”. European Journal of Clinical and Experimental Medicine 9, no. 4 (December 30, 2011): 461–474. Accessed April 26, 2026. https://journals.ur.edu.pl/ejcem/article/view/12884.