Comparative study of the PVD coatings on the plasma nitrided steelSurženkov, Andrei; Põdra, Priit; Sergejev, Fjodor; Saarna, Mart; Adoberg, Eron; Mikli, Valdek; Viljus, Mart; Kulu, PriitMaterials science = Medžiagotyra2012 / p. 40-44 : ill https://matsc.ktu.lt/index.php/MatSc/article/view/1339