Mukhammadjonovich, B. J. ., and P. M. M. . kizi. “Influence of Low Temperature Nitrocarburizing Modes on the Structure and Properties of Х12ф1 Steel”. Central Asian Journal of Theoretical and Applied Science, vol. 4, no. 9, Sept. 2023, pp. 134-8, https://www.cajotas.casjournal.org/index.php/CAJOTAS/article/view/1289.