Makarova , Anastasiia S., Polina Yu. Kaplan, Pavel V. Fedan, and Almir R. Makhmutov. “Conservation of Four Grave Steles from the Khan’s Shrine in the Bolgar State Historical and Architectural Museum-Reserve”. Arkheologiia Evraziiskikh Stepei (Archaeology of the Eurasian Steppes), no. 1 (February 29, 2024): 151–158. Accessed July 3, 2024. https://evrazstep.ru/index.php/aes/article/view/1196.