Janhunen, Juha (2006년 1월 27일). 《The Mongolic Languages》 (영어). Routledge. On page 129, Janhunen writes: 'The Nonni Dagur are normally divided into speakers of the Butha (northern) and Tsitsikar (southern) dialects'쪽. ISBN978-1-135-79690-7.
glottolog.org
Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian, 편집. (2023). 〈Dagur〉. 《Glottolog 4.8》. Jena, Germany: Max Planck Institute for the Science of Human History.
