Петрушин [Petrushyn D.] Д., and Черкашина [Cherkashina L.] Л. “Perfection of Speed-Power Internals for Boxers 16–17”. Slobozhanskyi Herald of Science and Sport, no. 4(31) (October 30, 2012): 74–79. Accessed December 23, 2024. https://journals.uran.ua/index.php/1991-0177/article/view/21935.