Sobol, Oleg, Anatoly Andreev, Vyacheslav Stolbovoy, Sergey Knyazev, Alexander Barmin, and Natalya Krivobok. “Study of the Effect of Ion Nitriding Regimes on the Structure and Hardness of Steel”. Eastern-European Journal of Enterprise Technologies 2, no. 5(80) (April 25, 2016): 63–68. Accessed May 7, 2024. https://journals.uran.ua/eejet/article/view/63659.