Weiskopf 1990, pp. 780–786 "(...) Hellenistic-era Iranian kingdom (...) But all in all, Cappadocia remained an Iranian kingdom, one which developed from an Achaemenid satrapy." Weiskopf, Michael (1990). "CAPPADOCIA". In Yarshater, Ehsan (ed.). Encyclopædia Iranica, Volume IV: Bāyju–Carpets XIV. London and New York: Routledge & Kegan Paul. pp. 780–786. ISBN978-0-71009-132-1.