Pigarev , Evgeniy M. “Formation of the Capital Center of the Ulus Of Jochi in the Lower Volga During the Reign of Uzbek Khan (analysis of Numismatic Material)”. Arkheologiia Evraziiskikh Stepei (Archaeology of the Eurasian Steppes), no. 3 (June 27, 2022): 295–303. Accessed November 7, 2026. https://evrazstep.ru/index.php/aes/article/view/773.