Lee, Sean; Hasegawa, Toshikazu (2013). "Evolution of the Ainu Language in Space and Time". PLOS ONE. 8 (4): e62243. doi:10.1371/journal.pone.0062243.
Street, John C. (1962). "Review of N. Poppe, Vergleichende Grammatik der altaischen Sprachen, Teil I (1960)". Language. 38 (1): 92–98. doi:10.2307/411195. JSTOR411195.
Georg, Stefan; Michalove, Peter A.; Ramer, Alexis Manaster; Sidwell, Paul J. (1999). "Telling general linguists about Altaic". Journal of Linguistics. 35: 65–98. doi:10.1017/s0022226798007312.
Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, penyunting (2017). "Ainu". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History.
Street, John C. (1962). "Review of N. Poppe, Vergleichende Grammatik der altaischen Sprachen, Teil I (1960)". Language. 38 (1): 92–98. doi:10.2307/411195. JSTOR411195.
Vovin, Alexander (2009). 萬葉集と風土記に見られる不思議な言葉と上代日本列島に於けるアイヌ語の分布 (Man'yōshū to fudoki ni mirareru fushigina kotoba to jōdai nihon rettō ni okeru ainugo no bunpu) [Strange Words in the Man'yoshū and the Fudoki and the Distribution of the Ainu Language in the Japanese Islands in Prehistory]. Nichibunken fōramu. 215. Kyōto: Kokusai Nihon Bunka Kenkyū. m/s. 1–57. OCLC443591083.