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2. PULS PLASMA Diffusionsbehandlung, Fachber;Grün;Hüttenpraxis Metallweiterverarbeitung,1987
3. Advances in equipment for plasma nitriding and carburizing;Collignon;Heat Treat. Met.,1982
4. Nituration Ionique;Lebrun,1988
5. Plasma assisted CVD of TiN on steels and geometric effects;Rie,1989