オグール語群
Golb, Norman & Omeljan Pritsak. 1982. Khazarian Hebrew Documents of the Tenth Century. Ithaca: Cornell Univ. Press.
Golden, Peter B. 1980. Khazar Studies: An Historio-Philological Inquiry into the Origins of the Khazars. Budapest: Akademia Kiado.
Golden, Peter B. 1998. "The Turkic peoples: A historical sketch." In: Johanson & Csató, pp. 16–29.
Johanson, Lars & Éva Agnes Csató (ed.). 1998. The Turkic languages. London: Routledge.
Johanson, Lars. 1998. "The history of Turkic." In: Johanson & Csató, pp. 81–125.
Johanson, Lars. 1998. "Turkic languages." In: Encyclopædia Britannica. CD 98. Encyclopædia Britannica Online, 5 sept.
↑ Hammarström, Harald; Forkel, Robert; Haspelmath, Martin et al., eds (2016). “Bolgar”. Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History. http://glottolog.org/resource/languoid/id/bolg1249
↑ Peter Golden, 'The Khazar Sacral Kingship' in Kathryn Von Reyerson, Theofanis George Stavrou, James Donald Tracy (eds.) Pre-modern Russia and its world: Essays in honour of Thomas S. Noonan, Otto Harrassowitz Verlag, 2006 p.86.
↑ アヴァール語とは全く別の言語である。
Brook, Kevin Alan. 2004. "Tales about Jewish Khazars in the Byzantine Empire Resolve an Old Debate". Los Muestros No. 54, pp. 27–29.
Brook, Kevin Alan. 2006. The Jews of Khazaria.