^Raymond G. Gordon, Jr, ed. 2005. Ethnologue: Languages of the World. 15th edition. Dallas: Summer Institute of Linguistics.
^Russian dialects in East Siberia and Kamchatka. Reviews such publications as: A. Krasovitsky and Ch. Sappok. "The Isolated Russian Dialectal System in Contact with Tungus Languages in Siberia and Far East"; A.Krasovitsky. "Prosody of Statements in the Speech of Old Settlers in the Polar Region".