Yepyk, L., and N. Petrenko. “The Ideological Component in the Activity of «Licneps» (the Secondhalf of the 20-Ies - the First Part of the 30-Ies Years of the 20th Century)”. Zaporizhzhia Historical Review, Vol. 1, no. 50, Jan. 2020, pp. 318-22, https://istznu.org/index.php/journal/article/view/225.