Janhunen, Juha (2006-01-27). The Mongolic Languages. Routledge. pp. On page 129, Janhunen writes: 'The Nonni Dagur are normally divided into speakers of the Butha (northern) and Tsitsikar (southern) dialects'. ISBN978-1-135-79690-7.
Janhunen, Juha (2006-01-27). The Mongolic Languages. Routledge. pp. Page 151, under 'Lexicon', Janhunen writes: "It has been estimated that, roughly speaking, more than half of the entire vocabulary of Dagur is Mongolic in origin, including both inherited items and reintroduced borrowings.". ISBN978-1-135-79690-7.
Janhunen, Juha (2006-01-27). The Mongolic Languages. Routledge. pp. Page 151, Janhunen writes: " Borrowings from Manchu amount to c.10 per cent, while borrowings from Chinese cover another 10 per cent of the lexicon. A smaller number of items has been borrowed from Ewenki. This means that a significant proportion, over 20 per cent, of all vocabulary items are specific only to Dagur". ISBN978-1-135-79690-7.
Janhunen, Juha (2006-01-27). The Mongolic Languages. Routledge. pp. In pages 151 and 152: "Due to its peripheral position, Dagur retains a considerable number of archaic Mongolic words, which are not commonly found in the modern Mongolic languages, but which are attested in Middle Mongol sources, such as the Hua-Yi yiyu and the ‘Secret History’. Such words include: tergul ~ terwul ‘road’ (Mongol *jam), najir ‘summer’ (Mo. *jun), xeky ‘head’ (Mongol *tologai), sorby ‘staff’ (Mongol *tayag). Other more or less idiosyncratic words include several basic items, such as: kasoo ‘iron’, saur‘spade’, ogw ‘brain’, basert ‘kidney’, twalcig ‘knee’, kataa ‘salt’, warkel ‘clothes’, el- ‘to say’ (cf. Mongol *kele-).". ISBN978-1-135-79690-7.
