Chkhatarashvili, Guram. “New Data of Obsidian Procurement and Mobility of Ancient Humans”. BLACK SEA REGION AT THE CROSSROADS OF CIVILIZATIONS 3, no. I (December 17, 2025): 47–60; 61. Accessed December 19, 2025. https://nbi.openjournals.ge/index.php/nbi/article/view/10222.