Khoroshev, O. “Certain Problems of Forming Organizational Principles of National Youth Associations in Ukraine in 1917”. V. N. Karazin Kharkiv National University Bulletin ‘History of Ukraine. Ukrainian Studies: Historical and Philosophical Sciences’, Vol. 19, no. 1138, 1, https://periodicals.karazin.ua/uahistory/article/view/1369.