Polgár, Szabolcs József. “The Character of the Trade Between the Nomads and Their Settled Neighbours in Eurasia in the Middle Ages”. Studia Uralo-altaica 53 (January 23, 2020): 253–263. Accessed April 18, 2024. https://ojs.bibl.u-szeged.hu/index.php/stualtaica/article/view/33241.