Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, penyunting (2017). "Athabaskan–Eyak–Tlingit". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History.
jstor.org
Caveney, Geoffrey (2014). "Sino-Tibetan ŋ- and Na-Dene *kw- / *gw- / *xw-: 1st Person Pronouns and Lexical Cognate Sets". Journal of Chinese Linguistics. 42 (2): 461–487. JSTOR24774894.