middle inflection. See also Substratum in the Vedic language References Bibliography Alexander Lubotsky, "The Indo-Iranian substratum" in Early Contacts between Uralic and Indo-European, ed. Carpelan et al., Helsinki (2001). Asko Parpola, 'The formation of the Aryan branch of Indo-European', in Blench and Spriggs (eds), Archaeology and Language III, London and New York (1999). External links Indo-Iranian Indo-Iranian languages Indo-Iranian