Півень Олександр Борисович (Oleksandr Piven), and Джим Віктор Юрійович (Viktor Dzhym). “Improving the Training Process of Power Sports Athletes Based on Their Biorhythms”. Slobozhanskyi Herald of Science and Sport, no. 5(43) (October 31, 2014): 65–69. Accessed December 23, 2024. https://journals.uran.ua/index.php/1991-0177/article/view/28729.