Strelchuk, Sergiy, Olena Lukina, Viktor Savchenko, Wojciech J. Cynarski, Mario Baić, Ioannis Barbas, and Georgiy Korobeynikov. 2022. “Peculiarities of the Competitive Activity of Taekwondo Players Aged 12-13 Years before and After the Changes in the Rules”. Health, Sport, Rehabilitation 8 (3):75-88. https://doi.org/10.34142/HSR.2022.08.03.06.