^Toumanoff, Cyril. The Arsacids. Encyclopædia Iranica. excerpt:"Whatever the sporadic suzerainty of Rome, the country was now a part—together with Iberia (East Georgia) and (Caucasian) Albania, where other Arsacid branched reigned—of a pan-Arsacid family federation. Culturally, the predominance of Hellenism, as under the Artaxiads, was now followed by a predominance of “Iranianism,” and, symptomatically, instead of Greek, as before, Parthian became the language of the educated"
^Shnirelman, V.A.(2001), 'The value of the Past: Myths, Identity and Politics in Transcaucasia', Osaka: National Museum of Ethnology. pp 79: "Yet, even at the time of Caucasian Albania and later on, as well, the region was greatly affected by Iran and Persian enjoyed even more success than the Albanian language".
^Benjamin W. Fortson, "Indo-European Language and Culture: An Introduction", John Wiley and Sons, 2009. pg 242: " Middle Persian was the official language of the Sassanian dynasty"