Jackson, A. V. Williams. 1920. Early Persian poetry, from the beginnings down to the time of Firdausi. New York: The Macmillan Company. pp.17–19. In Public Domain.
Mona Baker, Kirsten Malmkjr, "Routledge Encyclopedia of Translation Studies", pg 518: "among them the realignment of Central Asian Persian, renamed Tajiki by the Soviet Union," [1].
L. Paul (2005), "The Language of the Shahnameh in historical and dialetical perspective" pg 150:"The language of the Shahnameh should be seen as one instance of continuous historical development from Middle to New Persian" dins Dieter Weber, D. N. MacKenzie, Languages of Iran: past and present: Iranian studies in memoriam David Neil MacKenzie, Volum 8 de les «Iranica Series», Otto Harrassowitz Verlag. [2].
