^Mallory, J. P.; Adams, Douglas Q., eds. (1997). Encyclopedia of Indo-European culture. London; Chicago: Fitzroy Dearborn. p. 2. ISBN978-1-884964-98-5.
^Pamjav H, Feher T, Nemeth E, Padar Z (2012). "Brief communication: new Y-chromosome binary markers improve phylogenetic resolution within haplogroup R1a1". American Journal of Physical Anthropology. 149 (4): 611–615. doi:10.1002/ajpa.22167. PMID 23115110. "However, with the discovery of the Z280 and Z93 substitutions within Phase 1 1000 Genomes Project data and subsequent genotyping of these SNPs in ∼200 samples, a schism between European and Asian R1a chromosomes has emerged"
^Kristiansen, Kristian; Kroonen, Guus; Willerslev, Eske (11 May 2023). The Indo-European Puzzle Revisited: Integrating Archaeology, Genetics, and Linguistics. Cambridge University Press. pp. 70–71. ISBN978-1-009-26174-6. "How exactly the emergence and expansion of the Corded Ware are linked to the emergence and expansion of the Yamnaya horizon remains unclear. However, the Y chromosome record of both groups indicates that Corded Ware cannot be derived directly from the Yamnaya or late eastern farming groups sampled thus far, and is therefore likely to constitute a parallel development in the forest steppe and temperate forest zones of Eastern Europe. Even in Central Europe, the formation of the earliest regional Corded Ware identities was the result of local and regional social practices that resulted in the typical Corded Ware rite of passage."
^Chen, Sanping. "SOME REMARKS ON THE CHINESE" BULGAR"." Acta Orientalia Academiae Scientiarum Hungaricae (1998): 69–83.
^Motti, Victor Vahidi. "Richard Slaughter: The master interpreter of alternative planetary futures." Futures 132 (2021): 102796.
^Dwyer, Arienne M. "The texture of tongues: Languages and power in China." Nationalism and ethnoregional identities in China. Routledge, 2013. 68–85.
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