An Indo-Iranian Symbol of Power in the Earliest Steppe Kurgans
Kuznetsov P.
Journal of Indo-European Studies. — Volume 33, Number 3 & 4 — Fall/Winter 2005. — pp. 325-338.Excavations of a burial of the Yamnaya culture at Kutuluk have uncovered the remains of a large copper weapon analogous to both the later copper bar celts found in India and the vajra, the mythological weapon wielded by Indra.