Secret and investigative activities of militia in Ukrainian Soviet Socialist Republic in 1920s. Bulletin of Kharkiv National University of Internal Affairs, [S. l.], v. 74, n. 3, p. 84–95, 2018. Disponível em: https://visnyk.univd.edu.ua/index.php/VNUAF/article/view/104. Acesso em: 17 sep. 2025.