It remains quite clear, however, that Indic and Iranian developed from different Indo-European dialects, whose period of common development was not long enough to effect total fusion.

The Indo-European Dialects by Antoine Meillet (translated by Samuel N. Rosenberg), Alabama Linguistic and Philological Series No. 15, University of Alabama Press, 1967 (original book 1908, second edition 1922). Quoted in Talageri, S. (2000). The Rigveda: A historical analysis. New Delhi: Aditya Prakashan.