the Indian subcontinent rely heavily on the supposition that the Andronovo expanded southwards into Central Asia or at least achieved linguistic dominance across the Bronze Age urban centres of the region, such as the Bactria–Margiana Archaeological Complex. While the earliest phases of the Andronovo culture are regarded as co-ordinate with the late period of Indo-Iranian linguistic unity, it is likely that in the later period they constituted a branch of the Iranians. According to Narasimhan et al. (2019), the expansion of the Andronovo culture towards the BMAC took place via the Inner Asia Mountain Corridor. According to Hiebert, an expansion of the BMAC into Iran and the margin of the Indus Valley is "the best candidate for an archaeological correlate of the introduction of Indo-Iranian speakers to Iran and South Asia," despite the absence of the characteristic timber graves of the steppe in the Near East, or south of the region between Kopet Dagh and Pamir-Karakorum. Mallory acknowledges the difficulties of making a case for expansions from Andronovo to northern India, and that attempts to link the Indo-Aryans to such sites as the Beshkent and Vakhsh cultures "only gets the Indo-Iranian to Central Asia, but not as far as the seats of the Medes, Persians or Indo-Aryans". He has developed the Kulturkugel model that has the Indo-Iranians taking over Bactria-Margiana cultural traits but preserving their language and religion while moving into Iran and India. Based on its use by Indo-Aryans in Mitanni and Vedic India, its prior absence in the Near East and Harappan India, and its 16th–17th century BC attestation at the Andronovo site of Sintashta, Kuzmina (1994) argues that the chariot corroborates the identification of Andronovo as Indo-Iranian. Klejn (1974) and Brentjes (1981) found the Andronovo culture much too late for an Indo-Iranian identification since chariot-using Aryans appear in Mitanni by the 15th century BC. However, dated a chariot burial at Krivoye Lake to around 2000 BC. Eugene Helimski has suggested that the Andronovo people spoke a separate branch of the Indo-Iranian group of languages. He claims that borrowings in the Finno-Ugric languages support this view. Vladimir Napolskikh has proposed that borrowings in Finno-Ugric indicate that the language was specifically of the Indo-Aryan type. Since older forms of Indo-Iranian words have been taken over in Uralic and Proto-Yeniseian, occupation by some other languages (also lost ones) cannot be ruled out altogether, at least for part of the Andronovo