1. M. A. J. Somers and E. J. Mittemeijer, “Layer, growth, kinetics on gaseous nitriding of pure iron: evolution of diffusion coefficients for nitrogen in iron nitrides,” Metall. Mater. Trans. A, 26, 57 – 74 (1995).
2. L. Maldzinski, Thermodynamic, Kinetic and Technological Aspects of Producing Nitrided Layers on Iron and Steel in Processes of Gas Nitriding, Poznan University of Technology, Poznan (2002).
3. D. Jordan, H. Antes, V. Osterman, and T. Jones, “Vacuum nitriding of 4140 steel,” Heat Treat. Prog., 3 – 4, 33 – 38 (2008).
4. J. Michalski, “Using nitrogen availability as a nitriding process parameter,” Ind. Heat., 10, 63 – 68 (2012).
5. J. Michalski, Characteristics and Calculations of Atmospheres for Controlled Gas Nitriding of Steel, Institute of Precision Mechanics, Warsaw (2010).