↑ David W. Anthony, "The Horse, the Wheel, and Language: How Bronze-Age Riders from the Eurasian Steppes Shaped the Modern World", Princeton University Press, 2007, p 382
↑ Elena E. Kuz'mina, The Origin of the Indo-Iranians, Volume 3, edited by J. P. Mallory, Brill NV, Leiden, The Netherlands 2007, p 222