Korochanska , A. O. “"The European unity" and the Way of Its Realization: The Main Approaches During the First Pan-European Congress 1926 (on Materials of the Russian State Military Archive)”. Zaporizhzhia Historical Review, Vol. 1, no. 42, Feb. 2021, pp. 260-5, https://istznu.org/index.php/journal/article/view/1176.