Swietochowski, Tadeusz. Russian Azerbaijan, 1905-1920: The Shaping of a National Identity in a Muslim Community. Cambridge: Cambridge University Press. 2004: 12. ISBN 978-0521522458. (...) and Persian continued to be the official language of the judiciary and the local administration [even after the abolishment of the khanates].
Pavlovich, Petrushevsky Ilya. Essays on the history of feudal relations in Armenia and Azerbaijan in XVI - the beginning of XIX centuries. LSU them. Zhdanov. 1949: 7. (...) The language of official acts not only in Iran proper and its fully dependant Khanates, but also in those Caucasian khanates that were semi-independent until the time of their accession to the Russian Empire, and even for some time after, was New Persian (Farsi). It played the role of the literary language of class feudal lords as well.
Homa Katouzian, "Iranian history and politics", Published by Routledge, 2003. pg 128: "Indeed, since the formation of the Ghaznavids state in the tenth century until the fall of Qajars at the beginning of the twentieth century, most parts of the Iranian cultural regions were ruled by Turkic-speaking dynasties most of the time. At the same time, the official language was Persian, the court literature was in Persian, and most of the chancellors, ministers, and mandarins were Persian speakers of the highest learning and ability."
William Bayne Fisher, Peter Avery, Ilya Gershevitch, Gavin Hambly, Charles Melville. The Cambridge History of Iran: From Nadir Shah to the Islamic Republic. Cambridge University Press, 1991. ISBN0521200954, 9780521200950
Иванов Р. Н. Именем Союза Советских… Жизнь и гибель комбрига Нахичеванского. Герои Отечества. 2007.
Floor, Willem M. Titles and Emoluments in Safavid Iran: A Third Manual of Safavid Administration, by Mirza Naqi Nasiri. Washington, DC: Mage Publishers. 2008: 248. ISBN 978-1933823232.
