Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, penyunting (2017). "Turkik". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History.
narod.ru
altaica.narod.ru
Dybo A.V., "Chronology of Türkic languages and linguistic contacts of early Türks", Moskow, 2007, p. 766, [1]Diarkibkan 2005-03-11 di Wayback Machine (In Russian)
Menyimpang. Pernah berkembang dari rumpun Oghuz (Johanson 1998) [3]
web.archive.org
Dybo A.V., "Chronology of Türkic languages and linguistic contacts of early Türks", Moskow, 2007, p. 766, [1]Diarkibkan 2005-03-11 di Wayback Machine (In Russian)