Abramova, T.F., T.M. Nikitina, and A.V. Polfuntikova. 2022. “PHYSICAL FITNESS AND MORPHOFUNCTIONAL STATUS OF BOYS AGED 6-8 YEARS”. Theory and Practice of Physical Culture, no. 7 (August):37-40. http://tpfk.ru/index.php/TPPC/article/view/288.