PETASYUK, O. COOPERATORS AS PART OF THE FIRST MEMBERSHIP OF THE GENERAL SECRETARIAT OF UKRAINE: TO THE BIOGRAPHICAL PORTRAIT. Kyiv Historical Studies, [S. l.], n. 1 (6), p. 84–87, 2018. DOI: 10.28925/2524-0757.2018.1.8487. Disponível em: https://istorstudio.kubg.edu.ua/index.php/journal/article/view/131. Acesso em: 15 nov. 2026.