Топорков Олександр Миколайович (Alexander Toporkov). “Physical Training of 30–40 Years Old Tourists Skiers to Ski Sports Hiking”. Slobozhanskyi Herald of Science and Sport, no. 1(45) (February 28, 2015): 134–139. Accessed July 18, 2024. https://journals.uran.ua/index.php/1991-0177/article/view/38478.