István Zimonyi, Ph.D. (1990), is Professor and was the head of Departments of Medieval and Altaic Studies at University of Szeged until 2021. His field of research is Turkology, Turkic language history and the medieval history of Turkic speaking nomads in Central Eurasian steppe and Eastern Europe including the Turkic - early Hungarian contacts. He has published monographs and articles on the relevant field: The Origins of the Volga Bulghars. Studia Uralo-Altaica 32. Szeged, 1990; Orientalische Berichte über die Völker Osteuropas und Zentralasiens im Mittelalter. Die Ğayhānī-Tradition (Ibn Rusta, Gardīzī, Hudūd al-cĀlam, al-Bakrī und al-Marvazī). Wiesbaden 2001 (together with Hansgerd Göckenjan); Medieval Nomads in Eastern Europe. Collected Studies. Ed. Victor Spinei. Bucureştu – Brăila 2014;  Muslim Sources on the Magyars in the Second Half of the 9th Century. The Magyar Chapter of the Jayānī Tradition. Leiden, Boston 2015.