Kvachantiradze, Eka (2012). "Urdure"(PDF). Caucasus in Georgian Sources: Foreign States, Tribes, Historical Figures. Encyclopedical Dictionary. Tbilisi: Favorite. p. 376. Archived from the original(PDF) on 2013-10-20.
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Kvachantiradze, Eka (2012). "Urdure"(PDF). Caucasus in Georgian Sources: Foreign States, Tribes, Historical Figures. Encyclopedical Dictionary. Tbilisi: Favorite. p. 376. Archived from the original(PDF) on 2013-10-20.