Grzesik, Ryszard. “‘A Kingdom of One Language and One Law Is weak’: The Multiethnicity of Early Medieval Hungary”. Średniowiecze Polskie i Powszechne 15 (December 29, 2023): 9–22. Accessed November 15, 2026. https://journals.us.edu.pl/index.php/SPP/article/view/15509.