KULMAN, D. Shivkova, Ljudmila: Das Tetraevangeliar des Zaren Ivan Alexandar. Südost-Forschungen, [S. l.], v. 1, n. 1, p. 352–353, 2021. Disponível em: https://www.suedost-forschungen.de/portal/index.php/sof/article/view/10522. Acesso em: 5 juni. 2025.