(1)
BÂCLEA, A.; DOBROVICI, S.; DRUGESCU, E.; CAZACU, N.; PREDA, N. Surface Hardening of 40Cr10 Steel After Short Time Nitriding in Fluidized Bed. The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science 2006, 29, 40-44.