Timofeeva, I. ., M. . Salimov, A. . Repina, and N. . Plushcheva. “Motor Actions Formation in 3-4-Year-Olds With down Syndrome: Efficient Progress Test and Monitoring Set”. 2021. Theory and Practice of Physical Culture, no. 11, Jan. 2022, pp. 54-57, http://tpfk.ru/index.php/TPPC/article/view/49.