A. M. Zhukeshov, A. T. Gabdullina, A. U. Amrenova, D. Batani, M. Mukhamedryskyzy, and Z. M. Moldabekov, “The nanodimension crystallite formation in steel surface after pulsed plasma flow action”, Int. j. math. phys., vol. 9, no. 1, pp. 70–74, Jun. 2018.