Clauson, Gerard, and András Róna-Tas, eds. Pre-Thirteenth-Century Turkish : Index Vol. I. Vol. Vol. 14. Studia Uralo-altaica. SZTE BTK Institute of Hungarian Language and Literature University of Szeged, 1981. Accessed July 3, 2025. https://ebook.ek.szte.hu/index.php/btk-magyarnyelviirodalmi-intezet/catalog/book/182.