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iranicaonline.org
"Koroglu, Literary Tradition". Encyclopedia Iranica. "The Oḡuz Turkic versions of the Köroǧlu story are known among the Azerbaijanis, the Turks of Anatolia, and the Turkmen, and they are most similar to each other regarding language and plot."
nisanyansozluk.com
Ruşen in Nişanyan, S. Turkish Etymological Dictionary
