Bezotosnyiy, V. F., E. V. Vlasenko, V. V. Kozlov, and O. V. Nabokova. “Non-Destructive Control of Materials Properties by the Frequency Balanced Method With Superimposed Electromagnetic Converters”. Electrical Engineering and Power Engineering, no. 1, July 2012, pp. 7-13, doi:10.15588/1607-6761-2012-1-2.