LUKAČ, D. Д. Сирков, Външната политика на Българя 1938–1941. Balcanica - Annual of the Institute for Balkan Studies, [S. l.], n. XV, p. 385–386, 2023. Disponível em: https://balcanica.rs/index.php/journal/article/view/1134. Acesso em: 30 jun. 2024.