VANKU, M. Бугарско-совјетски дипломатски односи. Balcanica - Annual of the Institute for Balkan Studies, [S. l.], n. XVIII-XIX, p. 435–436, 2023. Disponível em: https://balcanica.rs/index.php/journal/article/view/1043. Acesso em: 25 nov. 2024.