Бершов, Сергей, and Андрей Кийко. “Elbrus – Chronology, Recreation”. Slobozhanskyi Herald of Science and Sport, no. 2(58) (April 30, 2017): 18–22. Accessed April 18, 2024. https://journals.uran.ua/index.php/1991-0177/article/view/99843.