Skoryi С. А., and Zymovets Р. В. . “Artifact from Akhtyrka: To the Question of Bimetallic Pick-Axes of the Scythian Archaic Era in Eurasia”. Kazakhstan Archeology, no. 2 (20), June 2023, pp. 30-60, doi:10.52967/akz2023.2.20.30.60.