Гамалій, В. В., and Ю. В. Литвиненко. 2011. “Biomechanical Analysis Equipment Supply in Tennis Using the Latest Optic Electronic Movement Recording”. Slobozhanskyi Herald of Science and Sport, no. 4(27) (December):153-57. https://journals.uran.ua/index.php/1991-0177/article/view/29158.