Czan, A., E. Tillova, and J. Pilc. “Surface and Subsurface Residual Stresses After Machining and Their Analysis by X-Ray Diffraction”. Communications - Scientific Letters of the University of Zilina, Vol. 15, no. 2, June 2013, pp. 69-76, http://journals.uniza.sk/index.php/communications/article/view/621.