ALTHEIM, F. Qagan und Verwandtes. Südost-Forschungen, [S. l.], v. 1, n. 1, p. 69–85, 2021. Disponível em: https://www.suedost-forschungen.de/portal/index.php/sof/article/view/13261. Acesso em: 7 mai. 2024.