For citations:

Khlebnikov D. “Yubag Sapphire” and “Azure Yakhont”. An inquiry into Izbornik Sviatoslava hapax terniminology pertinent to the account of precious stones in ancient Russian books. A study in crimson. On “Sapphire” as mentioned in Ezek. 1:26 and “The Savior in Powers” iconography. RSUH/RGGU Bulletin: “Literary Teory. Linguistics. Cultural Studies”, Series. 2017;(2):50-68. (In Russ.) https://doi.org/10.28995/2686-7249-2017-2-50-68