Друзь [Valeriy Druz] В. А., Жерновнікова [Yana Zhernovnicova] Я. and Пятисоцька [Svitlana Pyatisotskaya] С. С. (2013) “Main criteria of estimation of the physical development and biological age of junior school-children which determine individual approach in the process of physical education”, Slobozhanskyi Herald of Science and Sport, (3(36), pp. 81–85. Available at: https://journals.uran.ua/index.php/1991-0177/article/view/21297 (Accessed: 14February2026).