Sobol, O., Andreev, A., Stolbovoy, V., Knyazev, S., Barmin, A., & Krivobok, N. (2016). Study of the effect of ion nitriding regimes on the structure and hardness of steel. Eastern-European Journal of Enterprise Technologies, 2(5(80), 63–68. https://doi.org/10.15587/1729-4061.2016.63659