А. Букалов and O. Karpenko, “On the distribution of the toponyms “Arya”, “Arya”, “Aria”, “Arja”, hydronyms “Danu”, “Dan”, ‘Don’ and others in Eurasia and Africa in the context of migrations of Indo-Iranian peoples. Part 1”, Language Origin, vol. 5, no. 1, pp. 42–46, Jan. 2018.