Kashaev, Sergey, and Natalia Pavlichenko. “Letter on an Ostracon From the Settlement of Vyshesteblievskaya-3”. Hyperboreus 21, no. 1 (September 10, 2015): 61–79. Accessed August 25, 2025. https://ciss-journal.org/index.php/Hyperboreus/article/view/12563.