^ Mayrhofer, Manfred (1979), Die altiranischen Namen [The Old Iranian Names] (Iranisches Personennamenbuch, Band I, Faszikel II) (in German), Vienna: Verlag der Österreichischen Akademie der Wissenschaften, page 29
^ Tavernier, Jan (2007), “1.2.36. Vištāspa- (Vi-i-š-t-a-s-p-): *Višta-aspa-”, in Iranica in the Achaemenid Period (ca. 550–330 B.C.): Lexicon of Old Iranian Proper Names and Loanwords, Attested in Non-Iranian Texts, Peeters Publishers, →ISBN, pages 22-23
^ Tavernier, Jan (2007), “2.2.67. *Vištāspa-”, in Iranica in the Achaemenid Period (ca. 550–330 B.C.): Lexicon of Old Iranian Proper Names and Loanwords, Attested in Non-Iranian Texts, Peeters Publishers, →ISBN, page 65