Klyashtorny S.G. Ancient Turkic Ethnical and Political Unions and Their Role in the Turkic Ethnogenesis // Altaic Religious Beliefs and Practices. Proceedings of the 33th Meeting of the Permanent International Altaistic Conference. Budapest, 1992.
The most ancient regions of Turkic ethnogenesis and glottogenesis are all connected with the Eastern part of Eurasia: Central Asia and South Siberia, from the Altai mountains in the west to the Hinggan mountains in the east. This vast area was not isolated from the neighbouring civilizations nor from the tribes which were of a different ethnic type residing in the forests, mountains and steppes. The migration routes, which varied in scale throughout the period of migration covered the whole of the Great Steppe. However, the stable correlation of the “Altaic” ethnogenesis with Eurasia's Eastern Steppland makes it possible to link the appearance of the first Turkic-speaking ethnical group (being the Western ones in the Altaic language family) with this period. This situation remained the same until the first centuries A. D…