GADOLIN, A. von. Ehrnrooth, Magnus: Casimir Ehrnrooth, Trogen tvenne tsarer och en furste Alexander. Südost-Forschungen, [S. l.], v. 1, n. 1, p. 420–420, 2021. Disponível em: https://www.suedost-forschungen.de/portal/index.php/sof/article/view/11807. Acesso em: 18 mai. 2024.