V.V., O. et al. 2018. Study of surface layers obtained by copper ion implantation into a target of steel 30хгсн2а by auger Spectroscopy methods. International Journal of Engineering & Technology. 7, 2.13 (Apr. 2018), 93–102. DOI:https://doi.org/10.14419/ijet.v7i2.13.11606.