“Nanostructured Surface for 38MoCrAl09 Steel by Nitriding in Nitrogen Atmosphere and YAG:Nd Pulse Laser Activation”. The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science, vol. 31, no. 2, Nov. 2008, pp. 79-84, https://ojs.ugal.ro/index.php/mms/article/view/3107.