Voropay, S.M., and O.V. Sukachov. 2013. “Comparative Characteristics of the State of the Motor Function of Boys and Girls Aged 4-5 Years”. Pedagogics, Psychology, Medical-Biological Problems of Physical Training and Sports 17 (4):3-7. https://www.sportpedagogy.org.ua/index.php/PPS/article/view/549.