Smokotina D.V. «Arsa: place on the map » // 2008. №2 (3) C.5-17
Kontev Arkady V., Borodaev Vadim B. «Formation of Ideas About the Eastern Source of the Volga and about the Irtysh in the Muslim Geographic Literature of the 10th Century» // Tomsk State University Journal 2020. №452 C.117-126
