KIKKAS, T. Surveillance Reports of National Units of the Red Army Political Departments in 1918–1920. Journal of the University of Latvia. History | Latvijas Universitātes Žurnāls. Vēsture, [S. l.], n. 16, p. 39–55, 2023. DOI: 10.22364/luzv.16.02. Disponível em: https://journal.lu.lv/luzv/article/view/635. Acesso em: 3 jul. 2024.