For citations:

Kolmogorov G.L., Chernova T.V., Aver’yanova E.M., Snigireva M.V. THE OPTIMAL GEOMETRY OF TECHNOLOGY DRAWING TOOL. Izvestiya. Ferrous Metallurgy. 2013;56(7):51-53. (In Russ.) https://doi.org/10.17073/0368-0797-2013-7-51-53