SPIRA, T. Sakmyster, Thomas L.: Hungary, the Great Powers, and the Danubian Crisis 1936—1939. Südost-Forschungen, [S. l.], v. 1, n. 1, p. 379–381, 2021. Disponível em: https://www.suedost-forschungen.de/portal/index.php/sof/article/view/9811. Acesso em: 1 mai. 2025.