MBZ = Rassadin V.I. 1980. Mongolo-burjatskie zaimstvovanija v sibirskix tjurkskix jazykax. Moskva. Baskakov N.A. 1975. Grammatika xakasskogo jazyka. Moskva. Doerfer G. 1964. Langvokale im Urmongolischen? [Journal de la Société Finno-Ougrienne 65]. Helsinki. Janhunen J. 1999. Laryngeals and pseudolaryngeals in Mongolic. Problems of phonological interpretation. – Central Asiatic Journal 43.1: 115–131. Mańczak W. 2004. Irregular sound change due to frequency and the Introduction by Szemerényi. – Baldi Ph., Dini P.U. (eds.) Studies in Baltic and Indo-European linguistics. Amsterdam: 125–137. Mańczak W. 2010. Irregular sound change due to frequency in Germanic languages. – Lingua Posnaniensis 52: 55–65. Menges K.H. 1955. The South-Siberian Turkic Languages, I. – Central Asiatic Journal 1: 108–136. Patačakova D.F. 1973. Dialekty xakasskogo jazyka. Abakan. Poppe N. 1987. Introduction to Mongolian comparative studies. Helsinki. Rassadin V.I. 1982. Očerki po istoričeskoj fonetikie burjatskogo jazyka. Moskva. Svantesson J-O. et al. 2005. The phonology of Mongolian. Oxford. Vladimircov B.J. 1929. Sravnitel’naja grammatika mongol’skogo pis’miennogo jazyka i xalxaskogo narečija. Vvedenije i fonetika. Leningrad.