SHEVCHYK, T. Ukrainian Intelligence in 1917-1921: Formation of Civil Position . Problems of World History, [S. l.], n. 17, p. 98–109, 2022. DOI: 10.46869/2707-6776-2022-17-4. Disponível em: https://journal.ivinas.gov.ua/pwh/article/view/210. Acesso em: 20 apr. 2024.