Fryczowski, K., M. Roskosz, D. Kukla, and M. Szwed. “Using of Barkhausen Noise in Hardness Evaluation of Carburized and Inductively Tempered Layers on AMS 6414 Steel”. Welding Technology Review, vol. 89, no. 11, Nov. 2017, doi:10.26628/wtr.v89i11.837.