1. A survey of the principles and practice of thermochemical heat treatments;Bell,1979
2. J.P. Houvion, The industrial development of ionic nitriding units, in Proc. 18th Int. Conf. on Heat Treatment of Materials, Detroit, May 1980, American Society for Metals, Metals Park, OH, pp. 289– 296.
3. H. Michel and M. Gantois, Elaboration, transformation and mechanical properties of layers obtained by ionic nitriding, industrial applications and recent developments, in Proc. 18th Int. Conf. on Heat Treatment of Materials, Detroit, May 1980, American Society for Metals, Metals Park, OH, pp. 350–363.
4. A. Dubus and J.P. Peyre, Characterisation of the mechanical properties of plasma nitrided layers on gear and tool steels, in Proc. 18th Int. Conf. on Heat Treatment of Materials, Detroit, May 1980, American Society for Metals, Metals Park, OH, pp. 312–324.
5. Sz. Farkas, E. Filep and Z. Kolozvary, Plasma nitriding improves service behaviour of textile machine components, in Proc. 18th Int. Conf. on Heat Treatment of Materials, Detroit, May 1980, American Society for Metals, Metals Park, OH, pp. 296–312.