Bobrovskyy, T. A., and A. A. Evdokimova. “THE LEAD SEAL OF A BYZANTINE OFFICIAL OF THE LATE 11th — EARLY 12th CENTURIES FROM THE EXCAVATIONS 2019 IN THE YARD OF THE St. SOPHIA CATHEDRAL IN KYIV”. Archaeology and Early History of Ukraine 38, no. 1(38) (June 1, 2021): 99–104. Accessed July 14, 2026. https://adiu.com.ua/index.php/journal/article/view/347.