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Robbeets, Martine; Oskolskaya, Sofia (2022). "Proto-Tungusic in time and space". In Hölzl, Andreas; Payne, Thomas E. (eds.). Tungusic languages: past and present. Berlin. pp. 263–294. ISBN978-3-96110-395-9. OCLC1356978751.{{cite book}}: CS1 maint: location missing publisher (link)