For citations:
Kozyrev N.A., Shevchenko R.A., Usol’tsev A.A., Prudnikov A.N. Welding of differentially heat-strengthened rails. Laboratory studies. Izvestiya. Ferrous Metallurgy. 2020;63(7):504-511. (In Russ.) https://doi.org/10.17073/0368-0797-2020-7-504-511