H. Pilkington,"Islam in Post-Soviet Russia", Psychology Press, Nov 27, 2002 . pg 27:
"Among other indigenous peoples of Iranian origin were the Tats, the Talishes and the Kurds"[1]
T. M. Masti︠u︡gina, Lev Perepelkin, Vitaliĭ Vi͡a︡cheslavovich Naumkin, "An Ethnic History of Russia: Pre-Revolutionary Times to the Present", Greenwood Publishing Group, 1996. pg 80:"The Iranian Peoples (Ossetians, Tajiks, Tats, Mountain Judaists)" [2]
Ter-Abrahamian 2005, p. 121. Ter-Abrahamian, Hrant (2005). "On the Formation of the National Identity of the Talishis in Azerbaijan Republic". Iran and the Caucasus. 9 (1). Brill: 121–144. doi:10.1163/1573384054068132.
Кавказский календарь на 1894 год [Caucasian calendar for 1894] (in Russian) (49th ed.). Tiflis: Tipografiya kantselyarii Ye.I.V. na Kavkaze, kazenny dom. 1894.