Janousek, L., M. Rebican, M. Smetana, and A. Duca. “Progress in Three-Dimensional Non-Destructive Assessment of Real Cracks from Eddy Current Testing Signals”. Communications - Scientific Letters of the University of Zilina, Vol. 17, no. 1A, Apr. 2015, pp. 17-22, http://journals.uniza.sk/index.php/communications/article/view/407.