Ryabchuk, V. ., . O. . Ponimasov, Y. . Titarenko, and . O. . Lyashenko. “KINEMATIC/ DYNAMIC INDICATORS OF BREASTSTROKE TECHNIQUE OF JUNIOR SWIMMERS”. 2022. Theory and Practice of Physical Culture, no. 1, Mar. 2022, pp. 28-30, http://tpfk.ru/index.php/TPPC/article/view/106.