For citations:

Erpalov M.V., Nukhov D.Sh., Bogatov A.A. THEORETICAL STUDY OF SHAPE CHANGES OF THE SINK MARK ON THE BACK END OF THE MATERIAL BLANK DURING BROACHING. Izvestiya. Ferrous Metallurgy. 2013;56(2):16-18. (In Russ.) https://doi.org/10.17073/0368-0797-2013-2-16-18