Arishin A.V., and Pogrebnoy A.I. “Features of the Stroke in the Process of Integrating Physical and Technical Training of Crawler Swimmers at the Stage of Improving Sportsmanship”. Theory and Practice of Physical Culture, no. 11 (November 4, 2023): 28–31. Accessed May 9, 2024. http://tpfk.ru/index.php/TPPC/article/view/816.